NEW YORK TIMES BESTSELLER • REESE’S BOOK CLUB PICK • “This book is every suspense lover’s dream and it kept me up way too late turning pages. . . . A novel with crazy twists and turns that will have you ditching your Friday night plans for more chapters.”—Reese WitherspoonA backpacking trip has deadly consequences in this “eerie psychological thriller . . . with alluring locales, Hitchcockian tension, and possibly the best pair of female leads since Thelma and Louise” (BookPa