The Curious case of the dog in the night time

This book can come in real handy when you want to find out some prime numbers. After all, the chapter numbers are all prime numbers. This book is about Christopher Boone, a 15 year old with a mental problem, who tries to solve a mystery of who killed his neighbour's dog, Welling ton. His findings take him to london and he eventually finds out that the murderer was in fact somebody very close to him...