Children’s books are a fickle thing. You need the right blend of lesson teaching but you also need to do it in a way that’s “tasteful.” Like if you’re gonna talk about bullies you have to be “nice” about it.
If you’re going to introduce subjects that involve bad things, you need to massage it a little so that kid understands but not necessarily “understands.” It’s teaching but subliminally.
Unfortunately some authors (and illustrators) don’t really do these things in the best ways. When you see these covers and titles, believe me when I say you’ll know what I mean.
Here are real children’s books that are going to creep you out