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Kindle Unlimited: the best new books to read in 2021

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Kindle Unlimited 2021 best books

Here are the best new books you can download for free to you Kindle if you have an active Kindle Unlimited subscription.

Are you planning to start or reactivate your Kindle Unlimited membership? This popular digital subscription costs $9.99 per month and gives access to well over 1.5 million ebooks, plus comics, magazines, and audiobook companions powered by Audible.

Before making a decision whether to sign up for Kindle Unlimited, make sure to find enough interesting titles to justify the monthly cost of the service.

Obviously, you can check out the default catalog of Kindle Unlimited eligible titles (you can do it on your Kindle or in a Kindle app, too), but the problem is that it’s not easy to find there the new releases the readers actually love. The default “featured” sort option is what Amazon thinks you will like.

The following list of the best new Kindle Unlimited books includes the titles that we have discovered in a few sections across Amazon, from a list of hot new Kindle releases, to Prime Reading additions, to Kindle Exclusives, to Amazon Charts.

All these sources combined give a better overview of what Kindle Unlimited books are worth reading in the coming months.

Jump to the list

Finding most popular Kindle Unlimited books – the best ways

Top 100 hot new Kindle books – opposite to the main Top 100 Kindle bestsellers, this list includes only the titles that have been released in the recent months. Approximately, 50-60% of the most popular new Kindle books are included in the Kindle Unlimited. You will see a large KU stripe at the top of a cover of each eligible book.

New & Notable in Amazon Prime Reading – this Prime-exclusive service offers a rotating catalog of around 3,000 Kindle ebooks. Most of them are available in Kindle Unlimited, as well. The books are hand-picked by Amazon editors. It’s interesting to find out what they think should win the hearts of Kindle Prime readers.

The newest Amazon Charts – the lists rank the top 20 most sold and most read Kindle books of the preceding week. Kindle Unlimited books can be found also in the most sold list. Each book that has been read in more than the length of the free sample is counted as sold. It’s easy to find KU books: look for the large gray logo at the bottom of book details.

Kindle Ebook Exclusives – it’s a directory of over 1 million ebooks that are exclusive to Amazon. Well over 90% of the included titles are Kindle Unlimited eligible. Most importantly, you can use the left sidebar to filter books by your favorite author or series – a feature not displayed in the main Kindle Unlimited catalog.

Jump to the list

Best Kindle Unlimited books by category – highlights

Before we move to the main list, have a quick look at the best current titles in the most popular categories.

Kindle Unlimited – Best Mystery & Thrillers

The Shadow Box - Luanne Rice - the best Kindle Unlimited thriller books
  • The Shadow Box by Luanne Rice – a haunting thriller about how far one wife is willing to go to expose the truth. #4 in Psychological Thrillers. Average rating: 4.5/5
  • Hadley and Grace by Suzanne Redfearn – a heart-pounding and emotional roller-coaster ride of self-discovery in the tradition of Thelma and Louise. #4 in Women’s Action & Adventure Fiction. Average rating: 4.4/5
  • Not One of Us by Debbie Herbert – a brooding thriller about a woman who must decide if safeguarding her family is worth burying a truth. #9 in Domestic Thrillers. Average rating: 4.2/5

Kindle Unlimited – Best Romance

The Wedding Game - Meghan Quinn - the best Kindle Unlimited romance books
  • The Wedding Game by Meghan Quinn – charming story of a crafting queen battling a jaded divorce lawyer on a wedding reality show. #1 in Romantic Comedy. Average rating: 4.2/5
  • Make It Sweet by Kristen Callihan – a charming, emotional romance about redefining dreams and discovering unlikely love along the way. #4 in Sports Romance. Average rating: 4.5/5
  • The Villain by L.J. Shen – an arranged marriage romance novel with teeth and claws. #3 in Sports Romance. Average rating: 4.6/5

Kindle Unlimited – Best Biographies & Memoirs

Widowish - Melissa Gould - the best Kindle Unlimited biographies
  • The Psychopath by Mary Turner Thomson – in 2006, Mary Turner Thomson’s world shattered when she discovered her husband Will was a bigamist, con man and convicted sex offender. #1 in Memoirs. Average rating: 3.9/5
  • Black Boy Out of Time by Hari Ziyad – a restless, and enlightening memoir by one of the most thought-provoking journalists today about growing up Black and queer in America. #2 in LGBTQ+ Biographies & Memoirs. Average rating: 4.1/5
  • Widowish by Melissa Gould – a hopeful memoir of grieving outside the box and the surprising nature of love. #8 in Death & Grief. Average rating: 4.4/5

Kindle Unlimited – Best Fanasy & Sci-fi

Infinite - Brian Freeman - the best Kindle Unlimited sci-fi books
  • Infinite by Brian Freeman – an explosive new psychological thriller that pushes the limits of reality as we know it. #1 in Science Fiction. Average rating: 4.3/5
  • Wings of Fury by Emily R. King – an epic novel of ancient Greece, Titans and treachery, and the women who dare to rise up against the tyranny of the Golden Age. #1 in Historical Fantasy. Average rating: 4.2/5
  • The Russian Cage by Charlaine Harris – a third part of the popular Gunnie Rose series where magic is an acknowledged but despised power. #14 in Dystopian Science Fiction. Average rating: 4.7/5

Kindle Unlimited – Best Teen & Young Adult

Rejected - Jaymin Eve  - the best Kindle Unlimited YA teen books
  • Rejected by Jaymin Eve – a new paranormal romance from USA Today bestselling author Jaymin Eve. The first book in Shadow Beast Shifters series). #4 in Paranormal Werewolves. Average rating: 4.6/5
  • Year of the Chameleon by Shannon Mayer – the four book in the Shadowspell Academy is “Harry Potter meets the Hunger Games in a bold twist on a classic magical young adult adventure.” #1 in Coming of Age Fantasy. Average rating: 4.8/5
  • A Deal with the Elf King by Elise Kova – this fantasy romance about a human girl and her marriage to the Elf King is perfect for fans of Uprooted and A Court of Thorns and Roses. #1 in Teen & Young Adult Epic Fantasy. Average rating: 4.4/5

Kindle Unlimited – Best Literature & Fiction

After Alice Fell - Kim Taylor Blakemore - the best Kindle Unlimited literature & fiction
  • The Speed of Light by Elissa Grossell Dickey – a provocative debut novel told in intersecting timelines over a tumultuous, defining year in one woman’s life. #3 in Friendship Fiction. Average rating: 4.2/5
  • West with Giraffes by Lynda Rutledge – the incredible true story of two giraffes who made headlines and won the hearts of Depression-era America. #8 in Historical Literary Fiction. Average rating: 4.7/5
  • After Alice Fell by Kim Taylor Blakemore – It’s 1865. Marion Abbott is summoned to Brawders House asylum to collect the body of her sister, Alice. #1 in Historical Thrillers. Average rating: 4.0/5

Kindle Unlimited – the best books to read in 2021

The Speed of Light

The Speed of Light - Elissa Grossell Dickey - Kindle Unlimited best books

Elissa Grossell Dickey

Diagnosed with MS, Simone awaits the results of another anxiety-inducing MRI. She’s just walked away from Connor, “a fixer” but possibly the love of her life.

Then, on a December morning at the university where she works, jarring gunshots pierce the halls. In a temporary safe place and terrified, Simone listens and pretends this will all be over soon.

As she waits for silence, her mind racing, Simone’s past year comes into focus. Falling in love and missing it. Finding strength in family and enduring friendships. Planning for the future, fearing it, and hoping against hope in dark places.

Her life has been changing at the speed of light, and each crossroad brought Simone here, to this day, to endure the things she can’t control and to confront those that she can.

Best sellers rank: #4 in Friendship Fiction
Number of reviews: 2,508

Average rating: 4.2/5

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Wings of Fury

Wings of Fury - Emily R. King - Kindle Unlimited best books

Emily R. King

Cronus, God of Gods, whose inheritance is the world. Among his possessions: women, imprisoned and fated to serve. The strong-minded Althea Lambros controls her own fate and lives to honor her dying mother’s plea to protect her two sisters at all costs.

On the southern isle of Crete, hidden among mortal women who have fled the Titans, is the Boy God, son of Cronus and believed dead. He shares Althea’s destiny to vanquish the Almighty—fate willing.

There will be war. If she’s to survive to write their history, the indomitable Althea must soar higher than any god.

Best sellers rank: #1 in Fairy Tale Fantasy
Number of reviews: 1,215

Average rating: 4.2/5

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The Accidental Text

The Accidental - Text Becky Monson - Kindle Unlimited best books

Becky Monson

Once upon a time, Maggie Cooper lived for adventure. Now she can’t even work up the nerve to ask out her coworker.

For a bit of self-therapy, she begins to text her recently deceased mother’s phone—the only problem is that the number has been reassigned and for weeks she’s been unknowingly texting a stranger her deepest thoughts and feelings.

When Chase Beckett, the unsuspecting stranger who has more in common with Maggie than he’d like to admit, texts back, Maggie is beyond mortified. But message after message and night after night, Maggie realizes that Chase’s wit, charm, and advice are exactly what the doctor ordered.

Is it enough, though, to get her back up in the sky? And what about her heart?

Best sellers rank: #1 in American Humorous Fiction
Number of reviews: 323

Average rating: 4.7/5

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The Shadow Box

The Shadow Box - Luanne Rice - Kindle Unlimited best books

Luanne Rice

After artist Claire Beaudry Chase is attacked and left for dead in her home on the Connecticut coast, she doesn’t know who she can trust. But her well-connected husband, Griffin—who is running for governor—is her prime suspect.

Just before the attack, Claire was preparing for an exhibit of her shadow boxes, one of which clearly accuses Griffin of a violent crime committed twenty-five years ago.

If the public were to find out who her husband is, his political career would be over. Claire’s certain her husband and his powerful supporters would kill her to stop the truth from getting out.

Claire must decide how much she’s willing to lose to take down her husband and the corrupt group of elites who will do anything to protect Griffin’s interests and their own.

Best sellers rank: #2 in Domestic Thrillers
Number of reviews: 22,821

Average rating: 4.5/5

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Bone Canyon (Eve Ronin Book 2)

Bone Canyon - Lee Goldberg - Kindle Unlimited best books

Lee Goldberg

The second book of the Eve Ronin crime series. A catastrophic wildfire scorches the Santa Monica Mountains, exposing the charred remains of a woman who disappeared years ago.

Bones don’t lie, and these have a horrific story to tell. Eve Ronin tirelessly digs into the past, unearthing dark secrets that reveal nothing about the case is as it seems.

With almost no one she can trust, her relentless pursuit of justice for the forgotten dead could put Eve’s own life in peril.

Best sellers rank: #15 in Women Sleuths
Number of reviews: 1,518

Average rating: 4.5/5

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A Splendid Ruin

A Splendid Ruin - Megan Chance - Kindle Unlimited best books

Megan Chance

After her mother’s death, penniless May Kimble lives a lonely life until an aunt she didn’t know existed summons her to San Francisco. There she’s welcomed into the wealthy Sullivan family and their social circle.

Initially overwhelmed by the opulence of her new life, May soon senses that dark mysteries lurk in the shadows of the Sullivan mansion. Her glamorous cousin often disappears in the night. Her aunt wanders about in a laudanum fog. And a maid keeps hinting that May is in danger.

Trapped by betrayal, madness, and murder, May stands to lose everything, including her freedom, at the hands of those she trusts most.

Best sellers rank: #28 in Historical Literary Fiction
Number of reviews: 10,461

Average rating: 4.3/5

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After Alice Fell

After Alice Fell - Kim Taylor Blakemore - the best Kindle Unlimited literature & fiction

Kim Taylor Blakemore

New Hampshire, 1865. Marion Abbott is summoned to Brawders House asylum to collect the body of her sister, Alice. She’d been found dead after falling four stories from a steep-pitched roof. Officially: an accident. Confidentially: suicide. But Marion believes a third option: murder.

Returning to her family home to stay with her brother and his second wife, the recently widowed Marion is expected to quiet her feelings of guilt and grief—to let go of the dead and embrace the living. But that’s not easy in this house full of haunting memories.

Just when the search for the truth seems hopeless, a stranger approaches Marion with chilling words: I saw her fall.

Now Marion is more determined than ever to find out what happened that night at Brawders, and why.

Best sellers rank: #1 in Gothic Fiction
Number of reviews: 2,817

Average rating: 4.0/5

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Rejected (Shadow Beast Shifters Book 1)

Rejected - Jaymin Eve - the best Kindle Unlimited YA teen books

Jaymin Eve

As a wolf shifter growing up in a strong pack, I should be living my best life. But after my father tried to kill our leader, I’m labelled an outcast, traitor, less than dirt.

When I can’t take pack life any longer, I run, but apparently they don’t like losing their punching bag. Torin, the leader’s son, drags me back before my first shift… a shift that will reveal my true mate. I never could have predicted who mine would be, but the moment my wolf looks upon him, I’m filled with hope for a brighter future.

Afterall, no one ever rejects their true mate, right?

Best sellers rank: #1 in New Adult & College Fantasy
Number of reviews: 2,707

Average rating: 4.6/5

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The Psychopath

The Psychopath - Mary Turner Thomson

Mary Turner Thomson

In 2006, Mary Turner Thomson’s world shattered when she discovered her husband Will was a bigamist, con man and convicted sex offender.

Unbeknownst to her, this would be the start of a bold new chapter in her life, fighting to protect other women from his heartless gaslighting campaigns—and putting a stop to his endless deception.

When she discovered that her husband had continued to prey on new victims, she vowed to turn his betrayal into a force for good. On her mission to protect these women and others, Mary also learned more about the psychopathy behind Will’s duplicitous behaviour.

Best sellers rank: #1 in Biographies & Memoirs of Women
Number of reviews: 2,275

Average rating: 4.0/5

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Infinite

Infinite - Brian Freeman - the best Kindle Unlimited sci-fi books

Brian Freeman

One rainy night, the unthinkable happens: Dylan Moran’s car plunges off the road into a raging river, his beautiful wife drowning as he struggles to shore.

In the aftermath, through his grief, Dylan experiences sudden, strange visions: wherever he goes, he’s haunted by glimpses of himself. Dylan initially chalks it up to trauma, but that changes when he runs into a psychiatrist who claims he’s her patient. She says he has been undergoing a unique hypnotherapy treatment built on the idea that with every choice, he creates an infinite number of parallel universes.

Now those parallel universes are unlocked—and Dylan’s doppelgänger has staked a claim to his world.

Best sellers rank: #1 in Technothrillers
Number of reviews: 3,869

Average rating: 4.3/5

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Find Calm: Simple Tools to Help Children Cope in an Unpredictable World

Find Calm - Ashley Graber and Maria Evans - Kindle Unlimited best books

Ashley Graber and Maria Evans

Do you want simple tools that work to find calm in your family? These mindfulness-based emotional regulation techniques for children ages 3-12 are easy to implement, fun, and designed with the busy caregiver in mind.

Child and family therapists Ashley Graber and Maria Evans packed this guidebook with coping strategies, sleep strategies, and step-by-step guidance for responding to your child’s big emotions with calm and confidence.

Learn to have conversations about difficult topics with your children and support them when unexpected changes occur in the home, at school, or in the greater community.

Find tools that work for your child from emotional regulation activities like the Glitter Jar, Finger Breathing, Calm Down Box, Code Word, Sleep Ninjas, and much more!

Best sellers rank: #32 in Parenting
Number of reviews: 25

Average rating: 4.9/5

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Understanding Body Language

Understanding Body Language - Scott Rouse - Kindle Unlimited best books

Scott Rouse

Scientific studies show that people use body language to express their true feelings about a given situation or topic.

With Understanding Body Language, you’ll discover essential information and how-to guidance for deciphering nonverbal communication so you can make better decisions about the people and situations you approach every day.

Start by learning how to properly observe people so you can uncover their subtle nonverbal cues without drawing attention to yourself. Then, practice on your friends and family with practical advice to help you better read social gatherings and telltale signs of disagreement. Finally, dive deeper with real-life scenarios you’ll likely encounter.

Best sellers rank: #1,505 in Self-Help
Number of reviews: 63

Average rating: 4.8/5

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Make It Sweet

Make It Sweet - Kristen Callihan - Kindle Unlimited best books

Kristen Callihan

Life for Emma isn’t good. The world knows her as Princess Anya on Dark Castle, but then her character gets the axe—literally. The cherry on top is finding her boyfriend in bed with another woman. She needs a break, and sanctuary comes in the form of Rosemont, a gorgeous estate in California promising rest and relaxation.

Then she meets the owner’s equally gorgeous grandson, ex–hockey player and current recluse Lucian Osmond, and she sees her own pain and yearning reflected in his eyes.

Then there’s an impromptu nighttime skinny-dip, and Lucian’s luscious homemade tarts and cream cakes start arriving at Emma’s door, tempting her to taste life again…

Best sellers rank: #4 in Sports Romance
Number of reviews: 247

Average rating: 4.5/5

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The German Girl

The German Girl - Lily Graham - Kindle Unlimited best books

Lily Graham

Germany, 1938. Fifteen-year-old Asta and her twin brother Jurgen are stopped as they run home from school: “Your parents were taken. And if you go home, the Nazis will take you too…”

Heartbroken, Asta knows they must make the perilous journey across a hostile country that no longer feels like home to reach Denmark and their aunt Trine, a woman they barely know.

Crossing the border is punishable by death. In the middle of the snowy forest, barking dogs and armed soldiers capture Jurgen and Asta escapes.

The German Girl is a gripping and poignant story of a brave brother and sister seeking safety during one of the darkest times in our history.

Best sellers rank: #45 in Women’s Historical Fiction
Number of reviews: 364

Average rating: 4.5/5

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Not One of Us

Not One of Us - Debbie Herbert - Kindle Unlimited best books

Debbie Herbert

Thirteen years ago, Jori Trahan’s boyfriend vanished without a trace. Now, after moving back home to Alabama to care for her ailing grandmother and autistic brother, she comes face-to-face with the deadly mystery behind his disappearance.

Jori has a rare form of synesthesia, meaning she can “hear” colors; to her, tones of voice are as unique as fingerprints. With the help of this ability and a sympathetic cop, Jori comes dangerously close to uncovering the truth. But those responsible will go to any length—including murder—to keep their dark secrets buried.

Soon, it seems that no one in the sleepy bayou town is safe, and after Jori’s brother is kidnapped, she knows she must drop the investigation or risk losing her family.

Best sellers rank: #6 in Domestic Thrillers
Number of reviews: 9,888

Average rating: 4.2/5

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Firewall (The Firewall Spies Book 1)

Firewall - Andrew Watts - Kindle Unlimited best books

Andrew Watts

With its genius CEO and breakthrough technology, the Silicon Valley-based Pax AI Corporation is one of the hottest companies in the sector. But when one of their top scientists is murdered at a prestigious tech conference, company executives and foreign spies are all on the suspect list.

In the aftermath of the killing, CIA officer Colt McShane has been assigned to a joint counterintelligence unit based in San Francisco. The unit’s leadership believes that an international espionage ring has been stealing classified technology from Pax AI.

Now they want Colt to use his past relationship with Pax AI executive Ava Klein to penetrate the company’s inner circle, and uncover the mole.

Best sellers rank: #5 in Political Thrillers & Suspense
Number of reviews: 245

Average rating: 4.9/5

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West with Giraffes

West with Giraffes - Lynda Rutledge - Kindle Unlimited best books

Lynda Rutledge

Woodrow Wilson Nickel, age 105, feels his life ebbing away. But when he learns giraffes are going extinct, he finds himself recalling the unforgettable experience he cannot take to his grave.

It’s 1938. The Great Depression lingers. Hitler is threatening Europe, and world-weary Americans long for wonder. They find it in two giraffes who miraculously survive a hurricane while crossing the Atlantic.

What follows is a twelve-day road trip in a custom truck to deliver Southern California’s first giraffes to the San Diego Zoo.

West with Giraffes explores what it means to be changed by the grace of animals, the kindness of strangers, the passing of time, and a story told before it’s too late.

Best sellers rank: #8 in Historical Literary Fiction
Number of reviews: 12,717

Average rating: 4.7/5

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Hadley and Grace

Hadley and Grace - Suzanne Redfearn - Kindle Unlimited best books

Suzanne Redfearn

Needing to escape her abusive marriage, Hadley flees with her two kids, knowing it might be her only chance. A woman who can’t even kill a spider, Hadley soon finds herself pushed to the limits as she fights to protect her family.

Grace, new mother of baby Miles, desperately wants to put her rough past behind her for good, but she finds it impossible when her path crosses with Hadley’s, and her quest for a new start quickly spirals out of control and turns into a terrifying flight for survival.

Stronger together than apart, the two find their fates inextricably entwined, and as the danger closes in, each must decide how much she is willing to risk for the other.

Best sellers rank: #2 in Action & Adventure Literary Fiction
Number of reviews: 8,514

Average rating: 4.4/5

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Widowish

Widowish - Melissa Gould - the best Kindle Unlimited biographies

Melissa Gould

When Melissa Gould’s husband, Joel, was unexpectedly hospitalized, she could not imagine how her life was about to change. Overwhelmed with uncertainty as Joel’s condition tragically worsened, she offered him the only thing she could: her love and devotion. Her dedication didn’t end with his death.

Left to resume life without her beloved husband and raise their young daughter on her own, Melissa soon realized that her and Joel’s love lived on. Melissa found she didn’t fit the typical mold of widowhood or meet the expectations of mourning. She didn’t look like a widow or act like a widow, but she felt like one. Melissa was widowish.

Melissa’s personal journey through grief and beyond includes unlikely inspiration from an evangelical preacher, the calming presence of some Real Housewives, and the unexpected attention of a charming musician.

Best sellers rank: #3 in Jewish Biographies
Number of reviews: 3,713

Average rating: 4.4/5

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The Wedding Game

The Wedding Game - Meghan Quinn - the best Kindle Unlimited books

Meghan Quinn

Luna Rossi is a veritable crafting genius—she can bedazzle and bead so hard her Etsy site is one of the hottest in the world. So it’s only natural that Luna would convince her brother and his husband-to-be to compete on The Wedding Game, a “do-it-yourself” TV show, for the title of Top DIY Wedding Expert.

As a jaded divorce lawyer, Alec Baxter scoffs at weddings and romance. But when his recently engaged brother begs him to participate in The Wedding Game, Alec grudgingly picks up a glue gun and prepares for some family bonding.

Both fierce competitors, Luna and Alec clash on national TV as harsh words and glitter fly with abandon. But as they bicker over color swatches and mood boards, they find themselves fighting something else: their growing mutual attraction. While Luna is torn between family loyalty and her own feelings, Alec wonders if he might have been wrong about love and marriage all along…

Best sellers rank: #1 in Contemporary Romance
Number of reviews: 3,738

Average rating: 4.3/5

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Kindle Unlimited best books 2021

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