Recommended Reading
All three of these books are available both in conventional form and also for your Kindle.
The Penguin Dictionary of Curious and Interesting Numbers by David Wells
Fascinating and Indispensable
Alex's Adventures in Numberland by Alex Bellos
Written by one of the few journalists who understands Mathematics
The Simpson and their Mathematical Secrets by Simon Singh
If you like Maths and you like the Simpsons, this is the book for you.