I am interested in Physics and i think i will cont. my career on it.I wanna buy a physics book , uses considerably medium-high maths.I know all formulas.Now i am finishing colllege grade and i just know physics topics and never thought about their logic and wanna understand them and think hard on them.So which book u suggest for me ? Note : Got Feynman Lectures on pdf. Giancoli physics? Berkeley physics? Ohanian physics ? Thanks for sugg.