Someone from another forum reccomended this book to me:

http://www.amazon.com/Freud-Beyond-H.../dp/0465014054

I'm almost through it and I'm finding it to be a very clear and engaging read. They focus mostly on similarites / differences between theories and because it is fairly limited in scope it is clearer and more succinct than the majority of literature on the topic. I'm planning to go back through it and compile a little summary list of the main points and I think that will provide a nice structure that will make it easier to integrate future study on the topic.

:-)