Elsewhere by Gabrielle Zevin

The book "Elsewhere" by Gabrielle Zarvin is a very interesting. The main character, a girl named Elizabeth, who was killed in a bike accident, finds herself in the afterlife, a universe called Elsewhere, where everyone that dies ages backwards until the become babies and then sent down the river to be born again. Elizabeth is very depressed about her death and misses her whole life. When she dies, she learns how good her life was, and how she always took it for granted. Through this the reader learns  that you don't know what you have until its gone.
Liz misses things she had never even cared about before she died. She misses her annoying brother, her mean teachers, her homework, and the simple pleasure of life on earth. But most of all she's misses having obstacles to overcome in life. Everything in elsewhere is perfect, like a dream, no one ever has to work hard for anything
All in all this book makes you realize that all the little things in life that you do make you love your life, even if you don't realize it.. And all the obstacles you have to over come help you learn new things. When we have no problems and everything is perfect then we are almost not even human.