DS is nearly 7. He is an able and scarily fast reader (for me anyway, I read slowly). He has just devoured book four of the Harry Potter series (The Goblet of Fire) in 9 days. Now he is clamouring for more.
I was hesitant to let him read The Goblet of Fire in the first place and do not want him to proceed on to the next three books for a good while yet - though some of his classmates have been reading them. I need to present him with some other great books, just as fun but more age appropriate. To stop him from badgering me all the time about The Order of the Phoenix!
I have seen the recent 'bereft after HP' thread but feel that the books on there are way too 'old' for DS.
Any suggestions?
Preferably something a bit meaty, and ideally a series, or an author who was written lots of books, so that he can keep going for a while :)