the fault in our start is a book by John Green. These books treats about the main characters that is called Hazel Grace Lancaster, and she has a sickness that is very dificult to cure it is cancer. She is a girl of 16 years old, but she don't have a normal life because these sickness needs a lot of atention. She was in a group for cancer survivors. She also meets a boy one year older than her. He's name is Augustus Waters . He also have a type of cancer that cause him to lose his leg and he had to wear a prosthetic. It also has a survival rate like hazel .