Hello, I'm currently learning pre calculus from various sources. I'm preparing myself to hopefully be able to learn calculus which I feel is an essential tool for Physics. I've just purchased Apostol's Calculus Vol.1. Enough research for great introductory calculus textbooks brought me to Apostol. But recently I've discovered another great book that is talked about in this forum, Thomas Calculus 3rd e. My question is, is it a good idea to use Apostol calculus without any exposure to former calculus material, other than precalculus material? Will the rigor of Apostol benefit me as it will expand my comfort zone? Or should I first use Thomas Calculus 3rd e. to be able to learn the most from Apostol's? Thank you..