Unknown

Riley Sager

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Book cover for Unknown
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Book cover for Unknown
Book cover for Unknown
Image for variant 9798217044092
Image for variant 9798217349210

Unknown

Unknown

Riley Sager

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About the Author

Riley Sager is the New York Times bestselling author of ten novels, most recently With a Vengeance, Middle of the Night, and The Only One Left. A native of Pennsylvania, he now lives in Princeton, New Jersey.

Critical Reviews

Praise for The Unknown:
One of People's 15 Most Anticipated Books of Summer

"Sager spruces up well-worn genre tropes with aplomb...Sager's many fans will walk away satisfied."
--Publishers Weekly

Praise for Riley Sager and His Novels:
The latest dependable airport bookstore grab and name in summer suspense."
--The Chicago Tribune

"Sager is a master of the twist and the turn."
--Rolling Stone

"[Sager's novels are] all creepily atmospheric, easy to read without being fluffy, and fun as hell."
--Vulture

"Suspense master."
--USA Today

"With a Vengeance is a locked room thriller at its best! Nonstop suspense with twists and turns that will leave your head spinning!"
-- #1 New York Times bestselling author Freida McFadden on With a Vengeance

"Sager is a master of twists, and he delivers plenty of them here. The novel is also full of '90s nostalgia, but the things stalking the backyard and the mysterious institute hidden in the nearby woods are what make this a gripping read."
--New York Times Book Review on Middle of the Night

At the top of his game. Sager delivers a thriller so tautly written, so tightly constructed, that readers will emerge from the book breathless and in a mild state of shock. With this book, Sager has committed an act of brilliance."
--Booklist on With a Vengeance

"Sager's Middle of the Night is a twisty mystery with a touch of the supernatural, but it's also about the complexities of friendship, those fleeting but overwhelming feelings from growing up and coming to terms with profound grief."
--USA Today on Middle of the Night

"A clever and fun mashup of Agatha Christie's And Then There Were None and Murder on the Orient Express. Sager wields a deft hand in bringing all the elements together into a rip-roaring, tension-filled tale of greed, murder, and revenge. Enjoy the ride on the Phoenix."
--David Baldacci, #1 New York Times bestselling author of Strangers in Time on With a Vengeance

"Pure escape . . . A voyeuristic page-turner. After I read it, I dove for more Sager: luckily he has five others, bestsellers all."
--The Boston Globe on The House Across the Lake

Publishing Information

Publisher: Dutton
Pub date: 2026-08-04
Length: 368 pages

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