Everyday by David Levithan

A person named A wakes up in a different body everyday. Always the same age never the same person twice. A wakes up one day as Justin and meets Rhiannon in which A soon starts to fall in love with. They exchange emails every time A is in a new body. One day when A is a kid named Nathan, Nathan finds the email A created. Next thing anyone knows is that he is all over the news saying he was possessed by the devil and whatever you are he will find you. This book is highly recommended because it shows that anything is possible.