High in the Swiss Alps, a luxury hotel opens in what was once a sanatorium, but the new design can´t hide the building´s dark history for long . . . This is the chilling debut from the hottest new talent in crime fiction. AN INSTANT NEW YORK TIMES BESTSELLER AND A REESE´S BOOK CLUB PICK ´The Sanatorium will keep you checking over your shoulder. This spine-tingling, atmospheric thriller has it all: an eerie Alpine setting, sharp prose, and twists you´ll never see coming. A must-read.´ Richard Osman ´An eerie, atmospheric novel that had me completely on the edge of my seat.´ Reese Witherspoon EVERYONE´S IN DANGER. ANYONE COULD BE NEXT. An imposing, isolated hotel, high up in the Swiss Alps, is the last place Elin Warner wants to be. But she´s taken time off from her job as a detective, so when she receives an invitation out of the blue to celebrate her estranged brother´s recent engagement, she has no choice but to accept. Arriving in the midst of a threatening storm, Elin immediately feels on edge. Though it´s beautiful, something about the hotel, recently converted from an abandoned sanatorium, makes her nervous - as does her brother, Isaac. And when they wake the following morning to discover his fiancée Laure has vanished without a trace, Elin´s unease grows. With the storm cutting off access to and from the hotel, the longer Laure stays missing, the more the remaining guests start to panic. But no-one has realized yet that another woman has gone missing. And she´s the only one who could have warned them just how much danger they´re all in . . .