I have the care books, but unfortunately they're more focused on the care of popular horned frogs and lack good pictures of the others, just descriptions of where they are from. One book I have thought of getting is frogs and toads of the world by Chris mattison. I already have a book of his and it's pretty good on care. It might have some photos of the different horned frogs. The third does look like C. Aurita, from any pictures as I have seen and the fact that it does not look like C. cornuta.