Are you looking for a new book series to get lost in?

Whether you're a seasoned reader or a newbie, there's nothing quite like the joy of finding a book series that captures your attention and leaves you longing for more. But with so many options out there, how do you choose which one to dive into? That's where we come in. We've scoured Amazon and compiled a list of the best book series for adults. From sci-fi to fantasy, a mystery to romance, there's something for everyone on this list.

How We Choose These Best Books

We know how overwhelming it can be to choose a new book series to read, which is why we took a systematic approach to selecting the best ones. First, we looked at the ratings and reviews on Amazon, ensuring that only the most highly-rated and praised series made our list. Then, we looked at the author's reputation and credentials in the genre, ensuring that the books were written by experienced and talented writers. Finally, we considered factors such as popularity, cultural impact, and readability, ensuring that the books on this list are not only critically acclaimed but also accessible to readers of all levels.

Without further ado, let's dive into the 7 best book series for adults on Amazon.

1. The Expanse Series by James S. A. Corey

The New York Times Bestselling Series

The Expanse Series is a science fiction book series by James S. A. Corey, comprising of eight novels and several novellas. The story is set in a future where humanity has colonized the Solar System and is on the brink of war.

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What Is This Book About

The Expanse series is a science fiction epic that spans over 9 books (and counting). Set hundreds of years in the future, it follows a diverse cast of characters as they navigate the political and personal challenges of a universe on the brink of war. From conspiracy theories to interstellar travel, this series has everything you could want in a sci-fi saga.

Why You Will Love It

Fans of Star Wars and Battlestar Galactica will love The Expanse series. With intricate world-building, complex characters, and a thrilling plot that never lets up, this series will keep you hooked from beginning to end. But what sets The Expanse apart is its emphasis on diversity and inclusion. The series features a cast of characters that is as diverse as it is compelling, with the representation of people of all genders, races, and sexual orientations.

2. The Kingkiller Chronicle by Patrick Rothfuss

#1 New York Times Bestselling Author

The Kingkiller Chronicle by Patrick Rothfuss follows the story of Kvothe, a legendary magician and musician who has become a mythic figure in his own time. The books are told in a series of flashbacks as Kvothe recounts his life story to a scribe, chronicling his rise to power and subsequent fall from grace. 

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What Is This Book About

The Kingkiller Chronicle is a fantasy trilogy that tells the story of Kvothe, a legendary wizard and musician, as he recounts his life story to a chronicler. Set in a vividly imagined world full of magic, monsters, and politics, this series is a masterclass in epic storytelling.

Why You Will Love It

If you're a fan of Game of Thrones or The Lord of the Rings, The Kingkiller Chronicle is a must-read. With its intricate world-building, fascinating characters, and masterful prose, this series is a modern classic in the fantasy genre. But what sets The Kingkiller Chronicle apart is its focus on music. Kvothe's passion for music is woven throughout the series, making it a must-read for any music lover.

3. Outlander by Diana Gabaldon

#1 New York Times Bestselling Author

This historical fiction series follows the story of Claire Randall, a nurse from 1945 who finds herself transported back in time to 1743 Scotland. 

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What Is This Book About

Outlander is a historical fiction series that blends elements of romance, adventure, and time travel. The story follows Claire Randall, a British nurse who is transported back in time to 18th-century Scotland. There, she falls in love with a young Scottish warrior named Jamie Fraser and becomes embroiled in the Jacobite uprising against British rule.

Why You Will Love It

Outlander is a sweeping epic that combines historical accuracy with heart-pounding adventure and romance. Diana Gabaldon's writing is lyrical and evocative, bringing the Scottish landscape and culture to life in vivid detail. And the relationship between Claire and Jamie is one of the most compelling and unforgettable love stories in recent memory.

4. Harry Potter Series by J.K. Rowling

The Extraordinary National Bestseller

This beloved fantasy series follows the journey of a young orphan boy, Harry Potter, as he discovers he is a wizard and attends the Hogwarts School of Witchcraft and Wizardry. 

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What Is This Book About

Harry Potter is a young orphan who discovers on his eleventh birthday that he is a wizard. He has whisked away to Hogwarts School of Witchcraft and Wizardry, where he learns about magic, makes new friends, and discovers the truth about his past. Throughout seven books, Harry and his friends Ron and Hermione battle the evil Lord Voldemort and his followers, the Death Eaters, while navigating the challenges of growing up.

Why You Will Love It

The Harry Potter series is a beloved classic that has captured the hearts of millions of readers worldwide. J.K. Rowling's magical world is richly detailed and full of wonder, with engaging characters and intricate plot twists that keep readers on the edge of their seats. Whether you're a die-hard fan or a newcomer to the series, Harry Potter is a must-read for anyone who loves fantasy, adventure, and great storytelling.

5. A Song of Ice and Fire by George R.R. Martin

Best for Fiction

This epic fantasy series, famously adapted into the hit TV show Game of Thrones, is set in a medieval world where various noble houses vie for power and control over the Seven Kingdoms. 

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What Is This Book About

A Song of Ice and Fire is a series of epic fantasy novels set in the fictional world of Westeros. The story follows the various noble houses of Westeros as they struggle for power and control, while a mysterious threat looms from the north in the form of the Others and their undead minions. The series is known for its complex characters, political intrigue, and visceral violence.

Why You Will Love It

If you're a fan of epic fantasy, A Song of Ice and Fire is the series for you. George R.R. Martin's world-building is top-notch, with a deep history and lore that draws readers in and keeps them engaged. The characters are complex and multi-dimensional, with no clear lines between heroes and villains. And of course, the shocking plot twists and brutal violence keep readers coming back for more.

6. The Hunger Games by Suzanne Collins

New York Times Bestselling Author

This dystopian series is set in a future North America where a powerful Capitol forces children from each of the 12 districts to compete in a televised fight to the death known as the Hunger Games. 

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What Is This Book About

The Hunger Games is a dystopian young adult series set in a future where a tyrannical government known as the Capitol rules over the twelve districts of Panem. Each year, the Capitol hosts the Hunger Games, a televised event where one boy and one girl from each district are forced to fight to the death in a battle arena. The series follows the story of Katniss Everdeen, a girl from District 12 who volunteers to take her sister's place in the Hunger Games.

Why You Will Love It

The Hunger Games is a thrilling and thought-provoking series that explores themes of power, oppression, and survival. Suzanne Collins' world is vividly imagined, with a complex political system and well-drawn characters that feel both relatable and larger-than-life. The action-packed plot keeps readers on the edge of their seats, while the emotional depth of the story makes it a true page-turner.

7. The Lord of the Rings Trilogy by J.R.R. Tolkien

Best for Fantasy

This classic fantasy series follows the quest of hobbit Frodo Baggins as he sets out to destroy the powerful One Ring, which was created by the dark lord Sauron to give him control over Middle-earth. 

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What Is This Book About

The Lord of the Rings trilogy is a high fantasy epic that tells the story of a hobbit named Frodo Baggins who is tasked with destroying the One Ring, a powerful artifact that could spell doom for the entire world if it falls into the wrong hands. Along with his friends Sam, Merry, and Pippin, Frodo sets out on a perilous journey to Mount Doom to destroy the ring and save Middle-earth from darkness.

Why You Will Love It

The Lord of the Rings is a classic series that has stood the test of time for over 60 years. With its richly detailed world-building, complex characters, and epic battles, it's no wonder that the series has become a cultural touchstone. Plus, with the bonus of a hit movie trilogy based on the books, you can experience Middle-earth in multiple ways.

Best Book Series for Adults FAQs

We know that you probably have a lot of questions about our books, so we've put together this list of the most frequently asked questions to help you out.

Buying a book is a big decision, and we want to make sure that you have all the information you need before making your purchase.

Here are the answers to some of the most commonly asked questions about our books. If you don't find what you're looking for here, please don't hesitate to contact us and we'll be happy to help.

The most popular book series right now is the Harry Potter series by J.K. Rowling, which has sold over 500 million copies worldwide and has been translated into 80 different languages since its 1997 publication date. It spawned eight films from 2001-2011 that grossed a combined total of 7.7 billion dollars at the global box office, making it one of the highest-grossing film franchises in history. The Harry Potter universe also reaches far beyond books and movies; it includes spinoff books, a Broadway play, theme parks in Florida and Japan, video games, board games, and much more! Not only that – it has inspired millions around the world to be brave heroes fighting against evil forces for justice and truth - something we can all aspire to!

What is the number 1 best-selling book series?

The Harry Potter series by J.K. Rowling is the bestselling book series of all time, with over 500 million copies sold worldwide across the seven books in the collection. It has also been published in 79 languages and there are more than 400 million copies in print around the world. The success of this beloved series could not have been predicted at its inception; but through its intricate storyline, engaging characters, and gripping pursuit of good versus bad, it has become a global phenomenon that continues to capture hearts everywhere.

What are the top five best-selling book series?

The top five best-selling book series of all time are Harry Potter by J.K. Rowling, The Lord of the Rings by J.R.R Tolkien, A Song of Ice and Fire (Game of Thrones) by George R. R Martin, The Wheel of Time by Robert Jordan, and The Chronicles of Narnia by C.S Lewis.

Harry Potter is estimated to have sold over 500 million copies worldwide making it the highest-selling fiction series in history! The seven books were adapted into 8 films that grossed around 8 billion dollars at the box office - with 2 more movies in the works for 2021!

The Lord of Rings has sold an estimated 150 million copies since its publishing in 1954 and went on to be adapted into several successful films directed by Peter Jackson that earned nearly 6 billion dollars at the box office!

A Song Of Ice And Fire (Game Of Thrones), another incredibly popular book series written between 1996-2011 has been estimated to have sold over 90 million copies worldwide so far and was also adapted into a globally successful television show that aired from 2011-2019 on HBO with a total viewership count exceeding 100 million people!

Next, we have The Wheel Of Time written between 1984-2013 which is said to have sold an estimated 80 million books as well as inspired an online game, comic book adaptations, audiobooks, and fan art throughout its run! Finally, we come to one of the earliest fantasy novels ever published - 'The Chronicles Of Narnia' penned By C S Lewis first released back in 1949 and has reportedly managed to sell close to 75 million copies to date alongside inspiring films with a combined net worth close to 2 billion US Dollars at the international Box Office!

What is the number 1 book series of all time?

According to recent surveys and polls, the most popular book series of all time is J.K. Rowling's Harry Potter series. Since it was first published in 1997, the seven-book series has sold more than 500 million copies worldwide and become a global phenomenon with its blend of magic, adventure, and friendship that has resonated with readers everywhere. The books have been adapted into 8 feature films which have grossed over 7 billion dollars at the box office making them one of Hollywood’s most profitable franchises. Alongside this commercial success, it is estimated that Harry Potter books are now present in 80% of households across Britain and read by people of all ages around the world making it one of literature’s biggest success stories!

What is the longest book ever?

The longest book ever is currently believed to be "Muller's Universal encyclopedia of Arts and Sciences", published between 1791 and 1809 by Johann Friedrich Muller. The book consists of 20 volumes with a total length of over 12,000 pages, making it the world's longest book. The second-longest book is the Oxford English Dictionary, which contains around 21 volumes with an estimated 10 million words in total.

Apart from these two monumental works, many other long books have been written throughout history. One famous example is "The Novel of the Century" by André Frossard – spanning 63512 pages, it was written as part of a competition to find the longest novel ever published. Other notable entries include Viktor Hugo's Les Miserables (988 pages) and Jules Verne's Around the World in 80 Days (118 chapters).

It should also be noted that some books never actually get published due to their length– one example is Marcel Proust’s “In Search of Lost Time”, which consists of 7 volumes totaling around 320000+ words!

Which book series has the most titles?

The most titled book series is “Mystery Theme Park” written by Japan’s leading mystery novelist Keigo Higashino. It consists of an impressive 62 titles, which easily surpasses any other novel series for sheer volume.

The series follows a group of detectives who embark on a journey to uncover clues around various amusement parks in Japan and explore its history as they search for answers. Each book focuses on a different set of characters who must track down mysterious occurrences within the theme park and solve intricate puzzles to advance the storyline.

The Mystery Theme Park Series has been praised not only for its massive scope but also its intriguing plot lines that make readers eagerly anticipate each new installment. It was so popular in Japan that it even spawned a television show, graphic novel adaptations, and several films.

For any fan of detective stories or mysteries, this is an amazing book series with multiple mysteries waiting to be discovered!


In conclusion, there is plenty of book series out there for adults that offer rich, immersive worlds and unforgettable characters. Whether you prefer epic fantasy, science fiction, crime thrillers, or historical dramas, there is a series out there for you.

By selecting the top seven book series for adults, we aimed to provide a starting point for those who may be looking for a new series to dive into or who are new to the world of book series. From the magical world of Harry Potter to the dark and gritty world of Game of Thrones, these book series have captured the hearts and minds of millions of readers around the world.

Remember, reading is not only a source of entertainment but also a way to learn and grow as a person. So, take a chance on a new book series and let it take you on a journey you'll never forget.

Happy reading!

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