When You Reach Me by Rebecca Stead

                                 
When You Reach Me (2009)
by Rebecca Stead

Realistic fiction. Mystery. Science Fiction. Time Travel. Historical Fiction. All in one book!

In this story our protagonist, Miranda, receives a strange note asking her to record events in the future and reveal the location of her spare apartment key. Central to the story is a mentally unstable homeless man, the disintegration of Miranda's closest friendship, Miranda's mother's appearance on The $20,000 Pyramid and the classic book by Madeleine L'Engle, A Wrinkle in Time.