There are more sides to the story than just Cesar or Brad.
I dislike both because their methods are based on some fairly antiquated pseudo-science of "dog psychology" and their techniques usually involve the heavy use of P+ (or positive punishment) which (again) is a holdover from a bygone era.
I think it's fantastic that you are interested in dog training and that you are doing your research about it first
If you are interested I might suggest a few books from another perspective:
On learning theory
On dog evolution
On dog body language (this one is short and sweet)