“Another example of Hannah’s mastery.” — Booklist (starred review) A thrilling locked room mystery in the tradition of Agatha Christie He swore he was a killer. The truth was worse. An overnight plane delay is bad. Having to share your hotel room with a stranger is worse. But that is only the beginning of Gaby Struthers' problems. Gaby has never met Lauren Cookson before. So how does Lauren know so much about her? How does she know that the love of Gaby's life has been accused of murder? Why is she telling her that he is innocent? And why is she so terrified of Gaby?