Good thread idea - and I am a bit of a bookfiend (though they are competing for space with enclosures atm). Have relied more heavily on web-based info but have been looking for some nice references.
Won these in an auction:
And I have to tell you they are geared towards a children's library - won't help you much a'tall in husbandry - the info is pretty general such as you might find in an encyclopedia and the type is in that 3rd grage 24-point size. Not-too-shabby pictures though.