As a UBC student, we actually use these textbooks in our Calculus classes. At least first-year differential and integral calculus books have source codes confirmed to be licensed under CC-BY-NC-SA 4.0.
Went over some of the CLP 1 textbook, I like how things are explained and formatted. Much better than some of the US textbooks, this is neat.
As someone who took the class, I really liked the textbook!
Book reader community.