Instead of tweaking the Kate book, I got distracted by rebuilding the Impossible Charlie cover. It's over 2 years old and it was the best I could do at the time. And it's pretty good but it could be better. The Summer Horse book has out-sold it 6:1. That's kind of weird because Charlie always seemed like...Disney was interested in it for a while.
So maybe it's the cover.
I also got lost looking for horse show programs or posters and didn't really find anything so fantastic that was in public domain but got a number of wonderful circus posters.