The Curious Incident of the Dog in the Night-Time
Christopher John Francis Boone knows all the countries of the world and their capitals and every prime number up to 7,057. He relates well to animals but has no understanding of human emotions. He cannot stand to be touched. And he detests the colour yellow.
What starts as a minor mystery ends up becoming a long and eye opening journey for 15 year old autistic, Christopher. While his autism isn't the main theme of the book it does play into how he interacts with the world around him. Reading this book really helped me understand the mindset of Asperger's Syndrome a lot more.
The story is told from Christopher's perspective which includes his likes and dislikes, dogs, math, prime numbers, Sherlock Holmes, and how he basically copes with his phobias. Some of the saddest and funniest parts of the story are caused by him being too literal minded. Most of which help to identify with and like Christopher that much more.
If you're looking for a mystery you might well look to a different book but if you want an interestingly written story of an odd coming of age then I highly recommend this one.