I would give God Created The Integers as a reference to read up to where you are in math, not as something to get through. So, you could get a feel for what Euclid wrote, or what Descartes wrote, either after or during learning those lessons. As you move through your education, you can keep moving through the book, Cauchy, Galois, Riemann, etc. Anyway, that's the context in which I would give it. BTW Cantor's original diagonal proof is in GCTI. :)