DS is 3.5, likes books aimed at the 4-6 age range. We have lots of animal stories, but he's learning things we don't care for from them--like foxes are bad because they eat rabbits. We also do not care for the anthropomorphizing of animals-at least in every story! We're trying to gently rebuild our story collection with books about people or people-like fantasy creatures (fairies, etc). Non-antrhopomorphized animals are fine. (I don't want this to turn into an ideological debate--this is just how we feel).
Note: we prefer good quality storytelling--not just books about people doing things, and no non-fiction. We like nice art, too--not computer-generated stuff. We don't do marketed characters (Diego, etc). We're pretty Waldorfy (we've got the Beskow, Lindgren books), but open to non-Waldorfy books.
This is the kind of thing we like: