What is the book Percy Jackson the lightning thief about?

This book is about a boy called Percy Jackson who finds out he is son of the Greek god Poseidon. Zeus accuses him of stealing his lightning bolt and Percy has no idea what he's talking about. So Percy goes off on a quest with Annabeth (daughter of Athena) and Grover (a satyr) to find the lightning bolt and get his mother, who was taken away by the minotaur, back from Hades.

It is about a 12-year old boy who has dyslexia who finds out he is a demigod which means one of his parents is a greek god and the other is human. His mom is human and his dad is Poseidon.