I know there was a thread a while back on this, but I can't find it.
I need more easy to read chapter books (200 pages or less)  in my PreK-4 library.  I keep buying books that get great reviews but they are too long or too hard.  I find reviews of chapter books for this level (beyond Elephant and Piggie, but easier than Percy Jackson) scarce (in Horn Book for example).  
Popular among my students:
- Diary of a wimpy kid
- Dog Man
- Magic Tree House
- Rainbow Fairies
- Puppy Place.
I have managed to interest some kids in The Princess in Black, Race the Wild, Ranger in Time, Whatever After.
Looking for more ideas.  Thank you for any suggestions.
Elaine
Broad Brook School