Question about this book level for everyone? I would find this the hardest to make recommendations because most of the gifted kids by the time they are teen are at a reading level where they can ready almost any fiction on the shelves. The issue really comes down to interest & appropriateness. My recommended reading would honestly be probably a set of favorite fantasy & scifi. Partly because that is what I read at this age.

For example I would highly recommend but I know there are parents that would find this inappropriate.

Good Omens by Terry Pratchet & Neil Gaimen
-- Humor like Hitchhikers Guide but darker and takes a few liberties with stories from the bible.

Thirteen Reasons Why by Jay Asher.
-- Very good book about teen who commits suicide who sends to 13 people a series of audiotapes explaining why.