What Are The Best 2015 Novels To Read For Mystery Lovers?

Trying to pick out the best mystery novels from 2015 feels a bit like sorting through a box of puzzle pieces without the picture on the lid. It was a solid year, but not one with a single obvious standout that everyone rallies behind.

My top pick would have to be 'The Girl on the Train' by Paula Hawkins. I know, I know, it got so overhyped it became a cliché, but there's a reason it landed like a bomb. That unreliable narrator, Rachel's booze-fueled memory gaps, created a sense of voyeuristic dread I haven't felt since maybe 'Gone Girl'. The prose is propulsive in a way that makes you complicit in her messy, desperate search for truth. It's less a classic whodunit and more a 'why-is-she-like-this-and-what-did-she-actually-see' character collapse, which I found utterly transfixing.

Beyond that, Tana French's 'The Secret Place' was a masterclass in atmosphere. Shifting between two detectives in a posh Irish girls' school, it nails the terrifying, intense intimacy of teenage friendships and the cruelty that bubbles underneath. The supernatural hint from the 'Dublin Murder Squad' series is there, but the real horror is all too human. For something quieter and more literary, Kate Atkinson's 'A God in Ruins' isn't a pure mystery, but its war-time secrets and fractured timeline offer a profound, heartbreaking kind of detective work about one man's life.

Don't sleep on 'Career of Evil' by Robert Galbraith either. It’s the third Cormoran Strike book, and by this point, the dynamic between Strike and Robin is just electric. The plot is grim—a serial killer sending severed legs—but it’s their partnership, fraying and then reforging, that provides the real tension. It felt like the series truly found its brutal, compelling stride here.

Honestly, 2015 was kind of a weird year for mysteries if you were looking for traditional puzzles. So much of the buzz was around these psychological suspense juggernauts that blurred the lines. I remember picking up 'The Girl on the Train' because everyone was talking about it, and while it was a page-turner, the ending left me a bit cold—too neat after all that murky psychology. The one that really stuck with me was 'The Whites' by Richard Price writing as Harry Brandt. It's a gritty, NYPD cop story about a group of detectives haunted by the one perpetrator they each failed to put away. It's less about solving a new case and more about the past clawing its way back. Price's dialogue crackles, and the moral ambiguity is thick enough to chew on. It didn't get the same fanfare, but it's the one I've re-read passages from, just for the sheer force of the writing and the worn-down, real-world cynicism it portrays so perfectly.

Everyone always mentions the big thrillers, but a fantastic and often overlooked one from 2015 is 'The Crossing' by Michael Connelly. It has Harry Bosch teaming up with his half-brother, the Lincoln Lawyer Mickey Haller, in a role reversal where Haller needs Bosch to investigate a case to prove his client's innocence. Seeing the famously by-the-book, instinct-driven Bosch operate without a badge, navigating the ethical murk of the defense side, is completely compelling. The plot is tight, the pacing is relentless Connelly, and the character work between the two brothers—all that shared history and differing methods—elevates it above a standard procedural. It’s a must-read for series fans and a great entry point showing how procedural mystery can explore deeper themes of justice and family.

I'd argue the best pure mystery of that year was 'The Nature of the Beast' by Louise Penny. It's the eleventh Chief Inspector Gamache book, so you need some context, but Penny weaves a classic 'impossible' mystery—a boy claims to see a giant gun in the woods, is dismissed, then turns up dead—into the ongoing recovery of the Three Pines community. The solution ties into history, ballistics, and sheer human folly in a way that feels both clever and deeply tragic. It’s a cozy with real teeth.

My dark horse pick is 'The Killing Kind' by Chris Holm. It's a fantastic, pulpy neo-noir about a hitman who only kills other hitmen. When he's hired to take out an old friend, things spiral. It's not a whodunit; you know who the killer is from page one. The mystery is in whether he'll survive the consequences of breaking his own code. The prose is sharp and cynical, the action is brutal, and it’s just a blisteringly fun, amoral ride that deserved more attention.