Miranda's life is starting to unravel. Her best friend, Sal, gets punched by a kid on the street for what seems like no reason, and he shuts Miranda out of his life. The key that Miranda's mum keeps hidden for emergencies is stolen. And then a mysterious note arrives: 'I am coming to save your friend's life, and my own. I ask two favours. First, you must write me a letter.' The notes keep coming, and Miranda slowly realises that whoever is leaving them knows things no one should know. Each message brings her closer to believing that only she can prevent a tragic death. Until the final note makes her think she's too late.

"Smart and mesmerising" - New York Times

"A gently philosophical take on how the future can affect the present." - Independent on Sunday Books of the Year

"Witty, touching and clever." - Daily Mail

"Beautifully and simply told despite the fact that the story they tell is complex and thought-provoking. This is a great book." - LoveReading4Kids

"This is one of the most impressive children's books I've read in a long time. The writing (is) delicate yet robust, full of insight, compassion and wisdom. Stead manages to describe complex emotions in a fresh and original manner." - Irish Independent

"One of my favourite US children's books of recent years" - Daniel Hahn, Independent on Sunday

"A rather special find" - Telegraph

"A satisfying read that should remain popular as long as the classic A Wrinkle In Time to which it pays homage." - Carousel