Some years ago I took the same approach to start again from ground zero. I found Polya to be good, but a Mathematician's Delight is better and more accessible:

Some years ago I took the same approach to start again from ground zero. I found Polya to be good, but a Mathematician's Delight is better and more accessible: http://www.amazon.co.uk/gp/product/0486462404?ie=UTF8&tag=jorg-21&linkCode=as2&camp=1634&creative=19450&creativeASIN=0486462404 http://www.amazon.co.uk/gp/product/0486462404?ie=UTF8&ta...