10 Longest Book Series That Are Worth The Time

Published Sep 15, 2026, 5:41 PM EDT TJ Mills is an editor on ScreenRant's Comic team, where she combines her lifelong passion for DC with her analytical background as a former Intelligence Analyst. Since joining ScreenRant in 2023, she has specialized in covering major DC storylines, character evolutions, and industry developments. There is no better feeling than finding a book you love and then discovering that it is just the first of many. So, if you’re that special type of reader who loves to sink months, and perhaps even years, into a series, then you’ve come to the right place. While this list leans heavily into sci-fi and fantasy, we’ve tried to cast a wide net across the subgenres within these predominantly sci-fi and fantasy titles, from horror to romance. Before diving in, it’s important to clarify that this isn’t a list of the longest book series of all time, but rather relatively long book series that are also 10/10 reads and well worth the massive time commitment. This list starts with a modest yet commendable eight-book series and works its way up to a staggering 41-book series. Also, keep in mind that this list only counts the main novels in each series, so there may be even more smaller works and additional material associated with these massive series. 10 The Dark Tower by Stephen King Number of Novels: 8 Stephen King may be best known for his one-shot horror novels, but even the King of Horror has ventured into fantasy with his eight-book epic fantasy and dark western, The Dark Tower. Unsurprisingly, The Dark Tower features its fair share of horror, making it a perfect read for horror lovers looking for a long series in a genre known more for standalone novels than long-form series. This is also a must-read for Stephen King fans in general, since the series connects to many of King's other famous novels and links his shared fictional universe through its namesake: the Dark Tower, a physical anchor of all realities and parallel worlds throughout King's bibliography. 9 Malazan Book of the Fallen by Steven Erikson Number of Novels: 10 Love dark fantasy and military fantasy? Then look no further; Steven Erikson’s Malazan Book of the Fallen is the series for you. While ten books may sound modest compared to some other entries on this list, each book is MASSIVE, making the series feel much longer than just ten books. The world-building in this series is beyond exceptional, and after each book you read, you’ll feel like you’re holding an entire universe in your hands. Following a period of profound turmoil across an expansive empire, the series features rival nations, ancient races, and active pantheons of gods, leaving any world-building lover more than satisfied. 8 The Southern Vampire Mysteries by Charlaine Harris Number of Novels: 13 Urban fantasy, mystery, and romance collide in Charlaine Harris’ The Southern Vampire Mysteries, which are sometimes more commonly referred to as The Sookie Stackhouse Novels. Does the name Sookie Stackhouse sound familiar? It should, given that this series went on to become HBO’s hit series True Blood. This paranormal romance series is 13 books strong, with each one just as strong as the last, and is one of those reads that, once you start, you won’t stop until you’ve finished all 13 books. (I personally finished the series in two months while going to school full-time and working; yes, it’s that addictive.) Don’t let the naysayers tell you this is just another series featuring sexy vampires and werewolves. Yes, that is a MAJOR plus, but this series is so much more than that, and is BEYOND brilliant. 7 The Wheel of Time by Robert Jordan & Brandon Sanderson Number of Novels: 15 Would this truly be a best-of-the-best book list without Robert Jordan and Brandon Sanderson appearing on it? Of course not, which is why it’s unsurprising that the 15-book-strong The Wheel of Time series has made it onto this list. As one of the defining long-form epic fantasy series of the century, this is a must-read by most fantasy lovers’ standards. It’s important to note, as mentioned earlier, that this list only counts “primary works” in our “Number of Novels” totals. This explains why Goodreads similarly lists 15 primary works for the series, while also listing a staggering 60 total works under the larger series grouping. 6 Vorkosigan Saga by Lois McMaster Bujold Number of Novels: 16 Next up is one of the most acclaimed long-running science fiction universes of all time: Lois McMaster Bujold’s Vorkosigan Saga. Coming in strong with 16 books, Vorkosigan Saga is essential reading for sci-fi lovers and brilliantly combines space opera, political drama, adventure, comedy, romance, and more across its pages. This series also stands out from some of other entries on this list because it isn’t one giant linear story, but follows a family across generations. The primary character, however, is the brilliant and physically disabled strategist Miles Vorkosigan. It’s also worth noting that the series features numerous short stories in addition to its novels. 5 Realm of the Elderlings by Robin Hobb Number of Novels: 16 Can you even call yourself a fantasy fan if you haven’t read Robin Hobb’s Realm of the Elderlings series? Of course you can, but trust us, you’re seriously missing out on one of the greatest fantasy masterpieces of all time if you’ve yet to dive into it. This 16-book series is split into five interconnected sub-series, including four trilogies and one quartet, that span generations and different corners of the same world. Intensely character-driven and focused, this series will make you feel EVERY emotion on the human spectrum and is perfect for readers who love the found-family trope. 4 The Dresden Files by Jim Butcher Number of Novels: 18 I tragically have yet to read The Dresden Files by Jim Butcher, but my fantasy-loving father swears it should be on this list. Ranking in with an impressive 18 books and overwhelming fan praise, it seems the internet agrees with my father that this series is a modern fantasy masterpiece. When diving into this series, fans should expect the very best of the urban fantasy and hard-boiled detective genres. Taking place in modern-day Chicago, this series also serves as a lovely palate cleanser for those looking to take a break from high fantasy. 3 The Aubrey–Maturin Series by Patrick O'Brian Number of Novels: 20 Another entry chosen by this writer’s dear father is Patrick O’Brian’s The Aubrey–Maturin Series. In addition to its whopping 20 novels, this is a standout entry on this list given that it falls within the historical fiction genre, with a strong focus on naval adventure. Set during the Napoleonic Wars, the books follow the deep friendship between a brash, ultra-competent officer in the British Royal Navy, Captain Jack Aubrey, and the ship’s surgeon, Dr. Stephen Maturin, who is also a secret intelligence agent for the British Crown. 2 Shannara by Terry Brooks Number of Novels: 36 Forget everything you know about MTV’s canceled The Shannara Chronicles, as the two-season series truly doesn't do Terry Brooks’ Shannara masterpiece justice. Jumping back into the epic fantasy genre, this is a truly ENORMOUS traditional fantasy saga, with decades of popularity and 36 individual novels backing it. If we look beyond the 36 primary works, then that number looks closer to 53 total works. There’s no denying that choosing to read this series is a huge time commitment, but truly, every single book in this series is worth the time and then some. 1 Discworld by Terry Pratchett Number of Novels: 41 To no one’s surprise whatsoever, Terry Pratchett’s Discworld tops the list. This 41-book monster of a series is perhaps the ultimate example of an exceptionally long book series that is absolutely worth every second, and that’s not even including the fact that Goodreads lists the total number of works in the series at 89. This is the very best of the fantasy and comedy genres and the perfect series if you’re looking to laugh out loud and kick your feet while reading. Famous for poking fun at classic sword-and-sorcery tropes, myths, and folklore, Discworld is a masterclass in breaking the mold and creating something truly exceptional. If you think a series deserves to be on this list of “Long Book Series That Are Worth the Time,” let us know in the comments!