10 Best Mystery Series Books
There’s something endlessly satisfying about a good mystery. The way a well-crafted plot slowly unravels, the rush of racing against the protagonist to solve the puzzle, and the thrill of an unexpected twist—I just can’t get enough. Mystery books are one of my favorite genres to curl up with, whether it’s a classic whodunit or a more modern psychological suspense.
What I love even more? Mystery series. When I find a great detective or an intriguing protagonist, I want to stick with them through multiple books. It’s like catching up with an old friend—one who always brings a fresh case with them. Mystery series books are some of the most popular reads across all age groups for a reason: they offer not just one engaging story, but many, keeping readers coming back for more.
In this post, I’m rounding up some of the best mystery series books I’ve read and recommend. Whether you’re new to mysteries or already a devoted fan of Agatha Christie, you’ll find something here to love.
10 Best Mystery Series Books You Won’t Want to Put Down
Before we dive into the list, let’s talk about what you can expect from this roundup.
Mystery series books come in all shapes and sizes—from cozy village mysteries to gritty police procedurals, from historical crime novels to fast-paced thrillers. Some feature amateur sleuths, while others follow hardened detectives or quirky private eyes.
What ties them all together is their addictive nature. Once you read one book, you’ll want to devour the next. Learning about what makes a great mystery series can help you appreciate the storytelling structure and recurring characters even more. I’ve included a mix of popular favorites and a few hidden gems, so there’s something here for everyone—whether you’re a longtime mystery lover or just getting started.
What Are Mystery Series Books (And What Is The Best Mystery Book Series?)
Mystery series books are collections of novels that follow a central character (or characters) through multiple mysteries or investigations. While each book typically presents a new case or conundrum, the characters and their personal arcs evolve over time—giving you both a satisfying standalone story and a bigger narrative to follow.
What makes these series unique is their ability to blend plot-driven storytelling with character development. You get the suspense and puzzles you expect from a mystery, plus the added richness of seeing how a protagonist grows from book to book. Not all series are the same, of course—some are tightly connected and should be read in order, while others are looser and can be picked up at any point.
When it comes to what is the best mystery book series, opinions vary widely. Some swear by classic detectives like Hercule Poirot, while others prefer modern thrillers. Below, I’ve shared a few of my top picks to get you started—many of which you can find on the New York Times bestseller lists.
What Is The Best Mystery Book Series
Best Mystery Series Books
Hercule Poirot Series by Agatha Christie
You can’t talk about mystery series without mentioning the queen herself—Agatha Christie. The Hercule Poirot books are legendary for a reason. The Belgian detective, with his iconic mustache and meticulous methods, solves crimes using logic and psychology. From Murder on the Orient Express to The Mysterious Affair at Styles, these stories are filled with clever twists and timeless charm. Perfect for fans of classic mysteries.
I'd love to be stuck in an elevator with Agatha Christie's book character, Miss Jane Marple. Miss Marple would discover how to get us out of the elevator well before lunch. Jokes aside, I am partial to both Miss Marple and Hercule Poirot. I empathize with Miss Marple's character because I recognize how older women are rarely seen in today's society. I want to work with another woman who understands what it feels like to navigate along the outskirts of societal expectations. The society constructed within Agatha Christie's stories views Miss Marple critically because her value as an individual (to some degree) is linked to how she negotiates a patriarchal society. What makes Miss Marple special is her ability to see and understand the heart of humanity. - An excerpt from my interview with Camille Cabrera
Best Mystery Series Books
Chief Inspector Armand Gamache Series by Louise Penny
Set in the fictional village of Three Pines in Quebec, this series combines literary writing with engaging mysteries. Chief Inspector Armand Gamache is one of the most compassionate and wise detectives you’ll meet. Louise Penny’s storytelling style has earned her a spot on many York Times best-seller lists. These books are perfect for readers who enjoy thoughtful, character-driven mysteries with emotional depth.
Best Mystery Series Books
Cormoran Strike Series by Robert Galbraith
Written by J.K. Rowling under a pseudonym, this modern detective series follows private investigator Cormoran Strike and his assistant Robin as they solve high-profile cases in London. These are gritty, twisty mysteries with layered characters and compelling plots. A great option if you enjoy long, immersive reads and dark secrets.
Best Mystery Series Books
Veronica Speedwell Series by Deanna Raybourn
Author Interview with Deanna Raybourn
For fans of historical fiction with a feminist twist, this series is a treat. Veronica Speedwell is a butterfly-hunting Victorian-era sleuth with sharp wit and a fearless attitude. The mysteries are richly detailed, the banter delightful, and there’s just enough slow-burn romance to keep things interesting. Highly recommended for readers who loved the feel of Enola Holmes.
Best Mystery Series Books
Ruth Galloway Series by Elly Griffiths
This series blends archaeology with mystery, as forensic anthropologist Ruth Galloway helps solve crimes in the eerie marshlands of Norfolk. Elly Griffiths does an excellent job of balancing procedural details with Ruth’s complex personal life. These books are moody, atmospheric, and wonderfully British.
Best Mystery Series Books
Thursday Murder Club Series by Richard Osman
A newer entry into the mystery genre, this charming and clever series follows a group of retirees who solve murders in their spare time. Richard Osman’s wit and warmth shine through in these novels, making them both fun and surprisingly poignant. A great pick if you’re looking for a cozy mystery with heart.
[I’d like to be best friends with] Elizabeth, in the Thursday Murder Club, by Richard Osman. She's a retired spy who solves crimes with her friends, and I know she'd be wonderful to talk to. She might even know how to fix the elevator!- An excerpt from my interview with Gabi Coatsworth
Best Mystery Series Books
The No. 1 Ladies’ Detective Agency Series by Alexander McCall Smith
Set in Botswana, this beloved series introduces Precious Ramotswe, the country’s premier—and only—female private detective. With warmth, wisdom, and humor, she tackles cases big and small while navigating everyday life and community values. Alexander McCall Smith’s writing is charming and philosophical, offering a gentle but thought-provoking take on the mystery genre. A great pick for fans of character-driven stories and slower-paced mysteries with heart.
[I’d want to be stuck in an elevator with] Mma Precious Ramotswe from The No1 Ladies Detective Agency series by Alexander McCall Smith. She is such a great character bursting with charm, wit and wisdom. I’d ask about her latest case while we waited for the elevator to be repaired. - An excerpt from my interview with Janice Hallett
Best Mystery Series Books
Inspector Lynley Series by Elizabeth George
This long-running British crime series stars aristocratic detective Inspector Thomas Lynley and his working-class partner, Detective Sergeant Barbara Havers. Their dynamic and the complex psychological plots make for engrossing reads. Elizabeth George masterfully blends character development with sharp, suspenseful storytelling. A must-read for those who love rich prose, layered mysteries, and a strong sense of setting.
Best Mystery Series Books
Kinsey Millhone Alphabet Series by Sue Grafton
Beginning with A is for Alibi, this iconic series follows private investigator Kinsey Millhone as she solves crimes in 1980s California. Sue Grafton’s straightforward, engaging style and tough-yet-relatable heroine helped define modern detective fiction. The books combine classic noir elements with feminist sensibilities, and fans appreciate how grounded and realistic the stories feel. Sadly, Grafton passed away before finishing the “Z” installment, but the series remains a landmark in mystery fiction.
By the time I came upon Sue Grafton’s "A is for Alibi," I’d read plenty of mysteries, but they’d all been either Golden Age traditional/cozies written by women or hard-boiled/noirs by men.
So Grafton’s debut came as an awakening. Here was a book in the traditional “weary PI” style, yet written by and featuring a woman. And as I read on, I realized she’d created a sort of hybrid between the hard-boiled and the cozy—the story of a private investigator with no strings attached (“My apartment is small.... I don’t have pets. I don’t have houseplants.”) yet with a big heart (“I’m a nice person and I have a lot of friends.”). But most important, the novel was full of humor—a tad on the snarky side, yes, but who doesn’t love that?
I drew great inspiration from Grafton's books, and it was largely because of her that I felt able to write what I like to term my “snarky cozies.” - An excerpt from my interview with Leslie Karst
Best Mystery Series Books
The Dublin Murder Squad Series by Tana French
This gripping psychological crime series features a rotating cast of detectives working in and around Dublin. Each installment stands alone while weaving into a larger narrative. Tana French’s writing is atmospheric, literary, and emotionally intense, often blurring the line between mystery and literary fiction. Start with In the Woods, then prepare to be haunted by her deep explorations of character, memory, and motive. These are mysteries that linger.
[I’d want to be stuck in an elevator with] Antoinette Conway, a police detective from Tana French's novels The Secret Place and The Trespasser. I love tough women characters who are capable badasses, and whose toughness conceals deep love, care, and trustworthiness. And I love French's work: rich, encompassing mysteries where a little bit of the story is left unsolved every time. - An excerpt from my interview with Alison Stine
Looking for More Mystery Fun?
If you’re exploring mystery books with younger readers, don’t miss my roundup of kids mystery books—perfect for curious minds who love a good puzzle. Or, if you prefer your mysteries with a dash of love and longing, check out my list of mysterious romance books.
Final Thoughts on Mystery Series Books
Whether you’re diving into the world of Agatha Christie or falling in love with a modern sleuth, mystery series books offer something magical: the joy of returning to familiar characters while solving new puzzles each time. They’re the perfect mix of comfort and suspense, and there’s always another installment to look forward to.
Have a favorite series I didn’t mention? I’d love to hear about it—drop your picks in the comments or over on Instagram @ashleyhasty. Happy sleuthing!
