I just received a small eBook from Knowledge train explaining the PRINCE2 Principles. Of course you can find many PRINCE2 books and articles explaining these PRINCE2 Principles but the power of this eBook is the use of seven graphical mind-maps each showing one of the PRINCE2 Principles. And again, the proof, that a picture says more than a thousand words becomes reality. As stated, this is a little bit more than a picture; it contains text too, but definitely worthwhile reading. I would suggest that Knowledge train will create mind-maps for themes, and processes too and Foundation candidates will have, with only the mind-maps and no additional text, a nice summary to prepare themselves for the exam.
In one of my previous blogs you can find 7 cartoons showing the seven PRINCE2 Principles too. See Principles in graphics (PIGS).