Help I'm running out of ideas for reading obsessed DS who is 6.
He's read all the younger Enid Blytons, Roald Dahl, David Walliams, Mr Gum, Wimpy Kid, non-terrifying Harry Potters, Percy Jackson, Artemis Fowl, Cressida Cowell, the Ottoline books... We tried C.S.Lewis but he said they were too frightening and are giving Famous Five ago but they aren't really grabbing him.
Any suggestions for what to try next please?