m31415

beautiful introduction to complex analysis

a general book on mathematics in the spirit of Feynman lectures

an excellent treatment of differential operators, Green's functions, and other things that one encounters in infinite-dimensional vector spaces

one of the classics in the subject, and as Gerald Sussman once remarked, you glean new insights each time you read it

it's a bit narrow in scope (mostly dynamical systems with a little bit of chaos/fractals thrown in) but very good nonetheless

I would recommend "General Chemistry" by Linus Pauling, even though it's a bit outdated.