Spivak and Apostol are the two classic intro texts. Apostol is used more in programs that eventually get into physics, while Spivak is used more as a lead-in to

Spivak and Apostol are the two classic intro texts. Apostol is used more in programs that eventually get into physics, while Spivak is used more as a lead-in to analysis. In my youth, I once wrote a paper just on how Apostol's proof of the fundamental theorem of calculus was more beautiful than Spivak's, and that they were both way better my school's textbook, rofl. In my old age, I recognize that Spivak teaches you incredibly powerful and useful tools in its kinda obtuse approaches to things