Pen's Nest

No, it's not finished. There are 5 of 8 completed. Each is about 1000 pages though, so good for a "devourer" of fiction! IMO, it's well worth a read.

Something a little different, but brilliant, is Riddley Walker by Russell Hoban. One of my very favorite books, it takes place in a post-apocalyptic future, if your son likes that kind of thing. It's a fascinating story and what the author does with the language is amazing.