"When You Reach Me" is a Newbery Medal-winning science fiction and mystery novel by Rebecca Stead, published in 2009. The story is set in the Upper West Side of Manhattan during 1978 and 1979 and follows a sixth-grade girl named Miranda Sinclair. The plot revolves around Miranda receiving a series of mysterious notes from an unknown writer who says they are coming to save a friend's life and their own. The book intertwines elements of mystery, time travel, and the everyday challenges of growing up. It explores themes of independence, redemption, and friendship, and was inspired by a real story of a man with amnesia and the author's own childhood experiences. The novel was praised for its realistic setting and compelling narrative, achieving bestseller status and winning several awards including the 2010 Newbery Medal.