In strictest term Music Theory isn't theory at all. For someone like me who studied science theory and have wrangled with theorems in schools the term 'Music Theory' is quite scary.
After flipping few pages of below I know I won't be seeing Pythagoras or Plato a lot in my "Music Theory Study". Actually I'm a bit disappointed because mathematics is one of my keen subjects.
This is really a language subject.
With these books it's $367 more to the toll.