THE LIGHTNING THIEF by Rick Riordan
This story takes the best parts of Harry Potter and mixes it with classic Greek Mythology (could this get kids interested in the classics?), adds a bit of a mystery and a good deal of action with strange creatures like a Minotaur, Satyrs, and Furies.
Percy Jackson, the central character who is ADD and dyslexic, is in the 6th grade at a boarding school for difficult children and has little inclination of his parentage until he accidentally(?) vaporizes his math teacher. At the end of the school year, he returns to his home and while taking a day trip with his mother, he is attacked by strange creatures. The story continues to expose Greek Mythology and reveal Percy's parentage and what he is needed to do.
The tale is fast-paced and entertainingly moralistic pitting good against evil, light against dark, weak against strong. There is definitely a strong similarity to the Harry Potter stories, so if you didn't like Harry, you won't like Percy. Another Harry Potter, not quite, but definitely a fun read.