The only one left by Riley Sager

Everyone believes that Lenora Hope is a mass murderer. When the Hope family was massacred decades ago, she was the only one left after that tragic night. Mute, paralysed and confined to a wheelchair, Lenora has never been able to tell her side of the story. Until her new live-in caregiver Kit brings her a typewriter. And with one working finger Lenora begins to type: I want to tell you everything.