A Complete Guide to Reese Witherspoon's Hello Sunshine Book Club Picks

"The Sanatorium" by Sarah Pearse ($14)

• What it's about: "The Sanatorium" takes place at a former mental asylum that has been converted to a hotel. But when a guest named Elin's sister goes missing during a stay there and a snowstorm shuts off all possibility of escape, Elin is forced to confront the building's disturbing past.
• What Witherspoon says: "'The Sanatorium' is an eerie, atmospheric novel that had me completely on the edge of my seat. Let's set the mood . . . You're in a remote location — at a hotel — and there's a snowstorm. The winds are howling, the snow is pelting in every direction, there's a missing person, and a dead body shows up . . .!"