Moonwalking with Einstein
The book is really good. For those who are seeking the techniques, this is not the book you should look for.
I've already read about mind tricks to memorize things, but the way the book makes things clear about why it works and how our brain deals with it is mind-blowing and simple at the same time. The book explains how with a little practice you can learn 1000 decimals from PI and how at the same time your short-term memory will be only average.
Also, the references are really rich material, some scientific articles are also really worth reading.