REESE'S BOOK CLUB PICK | An instant New York Times bestseller! A page-turning thriller from the author of The Retreat. “An eerie, atmospheric novel that had m

'The Sanatorium will keep you checking over your shoulder. This spine-tingling, atmospheric thriller has it all: an eerie Alpine setting, sharp prose, and twist

#1 NEW YORK TIMES BESTSELLER • REESE’S BOOK CLUB PICK • “A psychological thriller that captivated me from page one. What unfolds makes for a wild, page-

Reese’s Book Club Pick Instant New York Times Bestseller A New York Times Book Review Top 10 Thriller of 2021 A Washington Post Top 10 Thriller or Mystery of

A REESE’S BOOK CLUB PICK and INSTANT NEW YORK TIMES BESTSELLER WINNER OF THE 2021 NEW AMERICAN VOICES AWARD, LONGLISTED FOR THE 2022 ANDREW CARNEGIE MEDAL, A