Background. Daughter is voracious, self-directed reader who works with libraries to find the sort of thing she likes to read.
Son isn't pro-active about books, preferring non-book entertainment when it's available. But has moved on from sharecropping series such as BeastQuest and Warrior Cats, and likes Lemony Snicket and Cherub. Quite a lot of what he reads are the books his sister has just finished reading.
He's currently devouring Little Brother with great enthusiasm.
He needs, I think, plenty of plot and strong young characters. Definite bonus points for computers and video games. We have pretty much no luck with classic books for him.