The format they use is beyond horrible. Hundreds of pdfs or a badly OCRd version?

Here it is in a much nicer format: http://books.google.com/books?id=a3gsxbGBdfIC&printsec=f...

This is one of the best texts on mathematics to have ever been produced. It shows exactly why Cambridge was, and remains to this day, one of the greatest places to study pure mathematics. The text also shows the brilliance of Hardy and why he deserved the Sadlerian Chair.

Another book to read that I recommend to all my friends: An Introduction to Mathematical Reasoning: Numbers, Sets and Functions by Peter J. Eccles.

You can find it on Amazon.