I have realised that almost everyone on this forum talks about the calculus by spivak, and from the arguments in it's favour make it unbeatable, it seems that nobody can learn analysis without reading that book. I am studying ONLINE at Paul's notes and Calculus by James Stewart, is my approach/route towards analysis is weak? do I have to restart calculus by reading Spivak? P.S. I am a self-taught student, and I have nearly finished calculus 2.