OMG, as a writer David Levithan's books are either hit or miss. However, this one was a huge hit. We know very little about the main character A, including what sex the character is. We do know A is 16. A is a jumper each morning A wakes up in a different 16 year old's body. The journeys A takes with each teen are sometimes mundane, but sometimes very powerful. This is a great book to try and help teens understand what empathy is and what walking a mile in someone else's shoes is actually like. My only regret is I can't reread this book for the first time.