People who regret not learning more mathematics; people who are fascinated by popular science books, but are left wishing they understood them better; people contemplating doing a mathematics-related degree; people who would like to talk about mathematics in an informed way without having to learn technical details.
Timothy Gowers, Rouse Ball Professor of Mathematics, Cambridge University
"a marvellously lucid guide to the beauty and mystery of numbers" - Gilbert Adair
2: Numbers and Abstraction
4: Limits and Infinity
7: Estimates and Approximates
8: Frequently Asked Questions