The Owley Pedo Artist:

https://www.richardcassaro.com/uncovering-the-secret-owl-society/

I was also thinking about the possibility that this guy might lure kids close by having them watch him draw cartoon-like characters. The sketch book has easily removable paper, so he may give his drawings to other people. They may be hanging up on the wall or refrigerator at his place, or at other places.