Most of the theory books that I have are discontinued, and I have them in spanish, so I can't provide you right now the titles to them (maybe some of then can be found somewhere

), but I'll see if by tomorrow in the afternoon I can find the titles in english and the authors.
As for the reference ones, I'm in love with this one:
There are at least for more books of the same collection, or at least, for now there are four edited in spanish, but I think there are several more in english that cover more specific areas. I have this one, which is the basic one, other for bones and other for drawing simplified anatomy. I find them very useful, even if I don't reference from them as much as I should.
And then, there are the books from Giovanni Civardi. These aren't too fancy, but they are interesting nonetheless, for they usually provide plenty of diferent poses to take inspiration from. and he covers not only anatomy, but perspective or animals too. Just these books aren't too heavy on the theory, more like plain references.