Very informative book. Smaller in size (not as in the number of pages but the dimensions) than I expected, so not the type you would read in one go. Very interesting when you just want to brush up on some general knowledge. Handy for long journeys as it fits into your pocket, as the series is suitably named DK Pockets. Every time you pick up the book it feels as if your absorbing some new knowledge even if you've looked at the page before, because its literally crammed full of facts, diagrams and colour pictures!