Elsewhere by Gabrielle Zevin

What do you imagine Heaven to be like when you die? Fifteen-year-old Liz Hall is about to find out when she is killed in a hit and run accident. Liz wakes up on a boat called the SS Nile and it is heading for Elsewhere. Elsewhere is just like earth only instead of getting older, you get younger until you become a baby and are returned back to Earth. At first Liz has a hard time adjusting to the fact she is dead, and spends most of her days watching her family and friends back on Earth. After some time she gets a job at the Department of Acclimation Division of Domestic Animals department. Shortly after that she contacts her family through the Well and meets Owen. They begin to fall in love, but things become complicated when Owen's wife dies and comes to Elsewhere. As the years pass Liz has to retire from her job because she is getting to young to do it. She is then sent back to Earth and reborn as a baby.

Tom Burnham