If anyone wants a book focusing on the purpose of calculus, check out http://www.math.smith.edu/~callahan/intromine.html http://www.math.smith.edu/~callahan/int

If anyone wants a book focusing on the purpose of calculus, check out http://www.math.smith.edu/~callahan/intromine.html http://www.math.smith.edu/~callahan/intromine.html This is significantly different style from Russian textbooks. If you want a nice one of those translated into English (albeit not the easiest to find a paper copy of), I like Piskunov’s book. https://archive.org/details/n.-piskunov-differential-and-integral-calculus-mir-1969 https://archive.org/details/n.-piskunov-differential-and-int...