Thomas, Kara. That Weekend. Delacorte Press, 2021. 978-1-524-71836-7. 336 p. $18.99. Grades 9-12. 

Claire’s – who had been unconscious – senses suddenly start becoming alert when a hiker and her dog approach on Bobcat Mountain. Claire doesn’t know if she’s alone, and she has a splitting headache. The woman and her dog leave to get help, and Claire begins to piece together what little she does remember: it’s prom weekend, but she didn’t go; she lied to her parents about being on Fire Island; and she’s hurt. Arriving at Sunfish Creek Hospital in the Catskill Mountains, Claire realizes she wouldn’t have hiked without friends Kat and Jesse, since Kat’s grandmother has a lake house nearby. After glimpsing herself in the ER bathroom mirror, Claire wonders, “Who are you?” and “What happened to you?” Then readers are taken back three days before Clair’s trip to Sunfish Creek. Told in alternating time, readers travel back and forth as Claire tries to puzzle out what happened to her and to her friends up on Bobcat Mountain.