The first book on his list, Conceptual Mathematics, is the the way to go. Most intros assume you are a math student and are already familiar with abstract algeb

The first book on his list, Conceptual Mathematics, is the the way to go. Most intros assume you are a math student and are already familiar with abstract algebra. It's available on google books: http://books.google.com/books?id=o1tHw4W5MZQC&printsec=frontcover http://books.google.com/books?id=o1tHw4W5MZQC&printsec=f... It's also written by the guy who was a driving force in the development of category theory. More so than even its creators, who laughed at him when as a student he first told them his idea of it being a foundation for all mathematics.