Ds wants some books for Christmas and I thought I would try to get a series of easy chapter books, he is currently on white (level 10), so some that he can grow into. I am looking for the 'boy' equivalent of rainbow fairies (in terms of reading level, hopefully not as formulaic). He definitely wants 'boy books' but he's not massively into boys stuff. He likes dinosaurs, space, knights etc. He enjoyed listening to the Hobbit and David Walliams over the summer. We already have Roald Dahl books. He likes history and would probably enjoy an easy mystery book. Any ideas?