A Publishers Weekly Best Book of the Year

';Not only a psychological thriller, but also a locked-room/locked-memory mystery extraordinaire.Anniston Star

An expert in memory must uncover the truth about her family's wartime past in this dazzling psychological thriller from the #1 internationally bestselling author of Anna O.

Two women checked in . . . only one checked out

Olivia Finn is a memory expert at Charing Cross Hospital in London. One night, she receives an urgent call from the police at the Hotel Lutetia on Paris's famous Left Bank. Olivia's French grandmother, Josephine Benoit, has appeared at the Lutetia in a distressed state claiming she committed a murder in one of the hotel's rooms at the end of the Second World War.

Travelling to Paris, Olivia finds her grandmother confused. But Josephine insists it is a recovered memory from the past. More disturbingly, hotel records show that a woman did die in that room of the Lutetia in 1945. Could Josephine's story actually be true?

As people start dying in the present day, Olivia is plunged into a race against time to uncover the truth about Josephine and what really happened all those years ago. Set among the glamorous streets of Paris, this addictive thriller asks: What if a memory could get you killed?