The Lightning Thief (Percy Jackson and the Olympians, book 1) by Rick Riordan
This is a fine young-adult novel about a new half-blood hero. It was fairly well written, and held my interest through out. If I had a complaint, it was that it read like a book that wanted to be a screenplay.
Comparisons to Harry Potter are inevitable, as this is about a boy in an unfortunate home environment, who discovers that he has secret powers and gets shipped off to a camp for other kids like him, where he discovers he is even more unique than even the other unusual kids there. Then, he teams up with a boy and a girl his age and goes on dangerous adventures.
I have heard that the later 4 books are better, so I look forward to checking them out.
The first two Percy Jackson books are on a par, the third and fourth are significantly better, and the fifth one is awesome.