New Mystery and Thriller Books for September 2025

I’m here to run down the New Mysteries and Thriller Books for September 2025! September kicks off Spooky Season, which is the perfect time to add new mysteries, thrillers and suspense books to your fall reading list. Which of these New Mysteries, Thrillers, and Suspense Books for September 2025 are you going to love? I’m here to help.

Photo collage of New Sempter 2025 mystery and thriller books

New Mysteries and Thriller Books for September 2025

Table of Contents

New September 2025 Mysteries and Thriller Books by Subgenre
New September 2025 Mysteries and Thriller Books by Release Date
New September Mystery Books In Series (if included)
Link to New September 2025 Historical Mystery Books

This list will include mostly standalone titles, with a few books that are sequels or series installments for books I have reviewed before.

Some of these links are affiliate links, which means I may receive a small percentage of qualifying purchases.

Recommended September 2025 Mysteries and Thrillers by Subgenre:

Books by Heavy Hitters in the Genre: Apostle’s Cove, The Hallmarked Man, Clown Town, Gray Dawn, A Slowly Dying Cause, Killing Stones

Cozy and Classic Mysteries: Seven Reasons to Murder Your Dinner Guest, Murder on the Marlowe Belle, The Impossible Fortune

Procedurals: The Hallmarked Man, A Slowly Dying Cause, Other People’s Houses, Killing Stones. Lost Hours

Psychological Thrillers: No One Knows You’re Here, Vanishing Place, Last One Seen

New Mystery and Thriller Books for the Week of September 2 2025

Please Don’t Lie by Christina Baker Cline and Anne Burt

This is a small town secrets book. I’m trying it and will report back!

Apostles Cove by William Kent Krueger

The Hallmarked Man (Cormorant Strike 8) by Robert Galbraith

New Mystery and Thriller Books for the Week of September 9 2025

Collage of New Releases for the Week of Sept 9 2025

Hot Wax by M.L. Rio

Cover of Seven Reasons to Murder Your Dinner Guests which is an overhead view of a dinner table

Seven Reasons to Murder Your Dinner Guests by KJ Whittle

I tried this out, and it was VERY different than the cover suggests.

My Goodreads review is here.

Mysterious Case of the Missing Crime Writer by Ragnar Jónassan

COVER OF CLOWN TOWN which shows a rainy evening scene

Clown Town (Slow Horses 9) by Mick Herron

Original photo of a book store display of Secret of Secrets

Secret of Secrets (Robert Langdon 6) by Dan Brown

The Belles by Lacey Dunham

A Killer Motive by Hannah Mary McKinnon

Most people on Goodreads loved this. It didn’t really work for me – my Goodreads review is here!

All This Could by Yours by Hank Phillipi Ryan

Return of Moriarty by Jack Anderson

The Grave Artist (Sanchez and Heron 2) by Isabella Maldondo and Jeffrey Deaver

New Mystery and Thriller Books for the Week of September 16 2025

Photo collage of New Releases for the Week of Sept 9 2025

Cover of the Wasp Trap with is an overhead view of a rectangular dining table

Wasp Trap by Mark Edwards

A “revenge dinner party” book with extensive backstory. Won’t please fast-paced thriller fans, but it does have a lot of tension.

My Readers Guide to the Wasp Trap!

No One Knows You’re Here by Brynn Greenwood

Cover of No Rest for the Wicked which shows a group of black cats

No Rest for the Wicked by Rachel Lee Adams

That cover is weird and creepy, and guess what? This dark procedural set in a town obsessed with Halloween had a Gillian Flynn Dark Places kind of vibe.

My Readers Guide to No Rest for the Wicked!

Cover of The Creeping Hand, which shows a red hand on a gold background

You Are the Detective by Maureen Johnson and Jay Cooper

I’m a fan of Maureen Johnson from her YA books, and what a fun ode to the Golden Age Mystery!

The star quality of this epistolary novel comes from the fabulous illustrations (maps, drawings, and more) by Jay Cooper. This would make a great holiday gift!

My Goodreads review is here!

Cover of Murder on the Marlow Belle: an illustration of a boat on a blue sea

Murder on the Marlow Bell (Marlow Murder 4) by Robert Thorogood

Enjoyed the first three books, so I’m reading this one!

Check out my Readers Guide to Murder on the Marlow Belle for a character list and protected spoilers!

Cover of the Wives of Hawthrones Lane, which shows a neighborhood under a purple sky

Wives of Hawthorne Lane by Stephanie de Carolis

Love a neighborhood thriller so I had to read this!

My Readers Guide to The Wives of Hawthorne Lane!

Cover of Other People's Houses which shows a swimming pool

Other People’s Houses (Fforde Morgan 3) by Clare Mackintosh

I’m a fan of this Welsh procedural series, and loved this new installment!

My Readers Guide to Other People’s Houses!

The Vanishing Place by Zoe Rankin

A Particularly Nasty Case by Adam Kay

Gray Dawn (Easy Rawlins 17) by Walter Moseley

New Mystery and Thriller Books for the Week of September 23 2025

Cover of The Killer Question: an illustration of a mug of beer on a blue background

The Killer Question by Janice Hallett

Love Janice Hallett and I love the pub trivia theme of this one!

Lost Hours by Lynn Tavernier

Cover of A Slowly Dying Cause which shows the English countryside

A Slowly Dying Cause (Lynley reboot) by Elizabeth George

I used to read the Lynley and Havers books back in the day so curious to see what they’ve been up to!

Cover of A Killer Wedding: an illustration of a glass of champagne on a red background

A Killer Wedding by Joan O’Leary

You know I can’t resist a wedding mystery! But was this book really a mystery? I’m not sure. There wasn’t much detection, but there was a lot of wedding drama.

My thoughts are on Goodreads!