The Artemis Fowl books might be a bit young for him, but they're good.
The Hunger Games by Suzanne Collins
Shipbreaker by Paulo Bacigalupi
The Name of the Star by Maureen Johnson has a female protag but is about an English boarding school, and investigating Jack the Ripper-esque murders in modern day. (It's paranormal, and there are sequels coming. There's descriptions of the murders, so if that would bother you or DS, be forewarned. My 16 year old daughter does't like gore, but enjoyed the series.)
Scott Westerfeld has many YA series that are very good, but for a boy I'd recommend Leviathan and the sequels - this is about a girl who masquerades as a boy in WWI, and it's a combination of steampunk and biopunk and is a lot of fun. His Uglies series is also fabulous (female protag again - this shouldn't be a big deal, IMO, but for some boys it is.)
My daughter really enjoyed the Inkheart series, but I didn't read these (I have read the ones above.)