Hello all. I was wondering if anyone has any external sources for a list of math textbooks, particularly by the same author, going from arithmetic all the way to differential calculus (or some other harder form of mathematics). The reason I want it to be the same author, is so I can be sure that I get every concept concisely, from A-Z. What I am looking for is specifically in .pdf form, so I can save it for external reading. Any help on this matter would be very much appreciated. If you do not know of any 'free' textbooks that go from basic math to the hardest form possible, please cite me to online textbooks, doing the same thing, but for a cost, and in book form.