Jon Margulies has been writing about technology, and especially Ableton Live for awhile, and has put his experience to great use. The book explains most everything anyone but the most advanced tweakhead (perhaps a person like Mr. Margulies himself) would want to know about using the program. But the book's two biggest virtues are, first, that it's written by someone who genuinely wants to help you learn, rather than by someone who wants to show you how me he knows--the learning is always downplayed and made to appear as unintimidating as possible (which another reviewer has touched on as well). Secondly, it breaks the technical areas down into digestible chunks. Margulies can, and does, hold off on telling you everything about something the first time he explains it. A typical comment is that what he's about to tell you isn't quite the whole story, but it's enough for now and he'll get into the rest of it at some later point (which is always referenced, usually with a page number). Another good thing about the book is that often, after he brings up a topic that hasn't been mentioned for awhile, he'll do a very brief, seemingly casual little reminder of the subject. It really helps. Live, which I remember in its earlier iterations as a relatively simple program with a manual of under 100 pages, now has an official reference guide of over 600 pages and has grown, by almost any standard, to be a very complicated program, actually now a little harder to get into in my opinion than Pro Tools. I haven't read every Ableton Live guide that's out there, but compared to a lot of music tech manuals I have read, this is an outstandingly superior book. Even good companies, like Arturia, often put out really bad manuals. Ableton's official reference manual is a world better than, for example, Arturia's really awful little pseudo-instructional manual on the Arp 2600, but it's just not as well-organized or as helpfully explanatory as Margulies "Ableton Live 9 Power." It's a model for other music-tech writers to emulate. Many thanks, Jon!