Well I just got an email from Panthera and it looks like there is a new book I have to get. The notice (attached below) includes an order link to Amazon. I was afraid it would be really expensive, but it is available in a paperback edition for less than twenty bucks US. Book is a field guide to the carnivores of the world.
Carnivores of the World | Panthera
Carnivores of the World | Panthera