Might be a tough one

I am trying to find short chapter books for my son. He seems to be really motivated to read if he likes the pictures/cover, etc. He loves books illustrated by:

James Marshall (the old fox in school type books) Jennifer E. Morris (Flubby) Arnold Lobel (frog and toad) Rob Scotton on (splat the cat)

If there are any short chapters books that have illustrations similar to these that you know, I'd love any recs!