I'm struggling a little with finding suitable books for DS (6) to read. he is a reasonably fluent reader, so has progressed beyond the picture book/ short chapter book stage. however he's not yet ready for the "longer chapter books" stage. He likes the Roald Dahl/BeastQuest/Astrosaurs etc type books when they are read to him but doesn't yet have the stamina to read them himself/sustain interest in the story if he reads them.
He does like the magic treehouse books but has read quite a few recently so I suppose I was looking for suggestions for something similar. I'm really looking for something, probably 100 pages max, shortish chapters, not too long a drawn out plot line ... (hope that makes sense). I'm feeling that there isn't much about for the child that is ready for more than a picture book/short story but not yet able to cope with a longer book.
Any suggestions much appreciated.