From the #1 bestselling author of The Letter Kathryn Hughes comes The Key, an unforgettable story of a heartbreaking secret that will stay with you for ever. 'Riveting' Lesley Pearse on The Letter. 'Gripping' Good Housekeeping on The Secret . 1956 It's Ellen Crosby's first day at work as a student nurse at Ambergate County Lunatic Asylum. When she meets a young girl committed by her father, and a pioneering physician keen to try out the various 'cures' available for mental illness, little does Ellen know that a choice she will make is to change all their lives for ever. 2006 Sarah is drawn to the abandoned Ambergate Asylum and whilst exploring the old corridors she discovers a suitcase in an attic belonging to a female patient who was admitted to the asylum fifty years earlier. The shocking contents of the suitcase lead Sarah to unravel a forgotten story of tragedy, lost love and an old wrong that only Sarah may have the power to put right. Join the hundreds of thousands of readers worldwide who have lost their hearts to Kathryn Hughes' novels: 'I cried buckets of tears reading it' 'You cannot fail to fall for this story' 'I went through every emotion under the sun' 'One of the finest stories I have ever read' 'I have finished this book with tears in my eyes but a smile on my face' 'I feel like I'm a better person for reading it'.