Ug. Too far behind to write what this book deserves. This is probably my fave book of this year. It's all about how how memory works. In short - humans evolved to have fantastic memory and comprehension regarding spacial relationships. For instance, walk through a building or a strangers home and after one minute you're very familiar with the surroundings. A week later you could probably still describe the area, layout, decoration, etc, fairly well. But lists of information are new to humans, so we're terrible at remembering them.

The book describes a technique called a 'memory palace' - where you literally construct a virtual space inside your head, and then imagine whatever information you want as objects in that space. I tried it, it works.