"Sets for Mathematics" by Lawvere/Rosebrugh. Learning category theory via the category of sets. Only requires some comfort in proof writing, at least what wou

"Sets for Mathematics" by Lawvere/Rosebrugh. Learning category theory via the category of sets. Only requires some comfort in proof writing, at least what would be covered in a first course in discrete math. Having some Linear Algebra, Groups, Rings, Topology, provide some concrete structures to help contextualize the material but it is not required.