This book lying down appears to be an intruction manual for the Roland D70 synthesiser. It seems almost impenetrable. After a quick flick through the contents page, you get the feeling that it could only be understood by people who already understand it! It doesn't so much teach you how to use the synth, you think, but rather confirms that what you've just worked out is in fact correct.
As far as manuals go, this one is, frankly, a pile of shit.