Music of the Primes - Marcus du Sautoy

Hard work but some great bits of knowledge, especially on RSN and security of the internet.

A Brief History of Time - Stephen Hawking

Fermats Last Theorem - Simon Singh

Brilliant book based on solving Fermats Last Theorem and exploring many aspects of the history of maths in the process.

The Universe in a Nutshell - Stephen Hawking

Tough going. Definately not bed time reading.

The Code Book - Simon Singh

Disappointing after reading Fermat's Last Theorem, but very interesting about codes and the Enigma machine.

A Short History of Nearly Everything - Bill Bryson

The Curious Incident of the Dog in the Night - Mark Haddon

Well recommended by many, "the chapters numbers are the prime numbers", but I found this to be somewhat tedious. This book does however give an different insight into understanding of aspergers syndrome.

1089 And All That - David Acheson

A lovely little book, don't be put off by its size, with plenty of well written and easy to understand mathematical anecdotes. Best explanation of e that I've ever read, seen or heard.