The Bear That Wasn't - Frank Tashlin
A satirical tale, often considered a children's book. When I read it as a child, I didn't find it very interesting. I'm still not too enthused by it, but I can at least find a sad theme in it: the humans who tore down a forest and built a factory have no conception of any world that they didn't build, plan, and organize, or any animals that aren't carefully regimented in zoos and circuses; allegorically, Tashlin also means there's no conception in the modern world of any behavior except the very narrow round of work and potted "entertainments". Even the humans, and the bears, victimized by this closed system come to be unable to think outside it.