I've always meant to take some physics courses and never had the time. I'm graduating this spring and going to grad school, so I won't really be able to squeeze them into my schedule, and I doubt I'll have the free time to teach myself. I would like to read up on it, though. Can you recommend any good physics books? I'm leaning towards pop sci rather than a textbook, although I've taken a fair bit of math (multivariable calc, linear algebra, etc., currently in diff eq) and can handle books with some rigor.