Fun fact: the author can ask for a particular animal, but it’s not guaranteed. When we were working on our Ember.ha book we–naturallly–asked if we could get a hamster on the cover. They weren’t sure they’d be able to influence the art chosen, but in the end they can as close as they could–a dormouse: https://www.oreilly.com/animals.csp?x-search=Ember&x-sort=an...