This is some of the books i would recommend to read before or during the arduous journey that is reading GEB.

Its important to note that while GEB is a self contained book, meaning everything you need to understand it is inside of it. However i also strongly feel that if, like me, you arent blessed with being able to grasp concepts right away, it can be valuable to expand on certain topics by reading other books before or even during (like myself) the journey.