Hello there, I'm currently enrolled in Calculus II (Integral Calculus), and I am slowly working my way through Spivak's Calculus. I intend to take Multivariable Calculus next semester. The course description is as follows: I was wondering if there were any clearly recommended books, similar to Spivak, for the above-mentioned class/content. I've got a couple of calculus textbooks that include multivariable content, but I'm looking for something that takes a more rigorous approach as a supplement. Also, since I'm here already, I'll be taking a Discrete Mathematics course with the following course description: I would very much appreciate any suggestions in that direction as well. This is the required text https://www.amazon.com/Discrete-Mat...-Susanna-Epp/dp/0534359450/ref=dp_ob_title_bk. Sincere thanks for any help.