Finally got it...

I had to check what is all the hype about this rare and obsolete book, i got a nice deal and i decided to buy it. 

I must admit that i was expecting to see some schematics of some lost sound circuit gems and rare modules inside (there are none) but i found out that i can still have a lot to learn and get inspired from this book .

It's larger format packs a lot of information, pictures and diagrams and it seems that by it's subjects versatility and depth it used to be some kind of college course/ text book. i still don't know if it's crazy prices on amazon are worth it, but I'm quite sure it is great.