I can recommend the Discworld, especially as it starts out as simple fantasy with a touch of parody, but grows into a huge satirical world reflecting our own, and may get him thinking about the big subjects in life, which can't be a bad thing.
While at heard a humourous set of books, it's still managing to be fairly deep with multiple plotlines at once and threads and characters woven thru multiple tales.
While at heard a humourous set of books, it's still managing to be fairly deep with multiple plotlines at once and threads and characters woven thru multiple tales.