I can't say enough positive things about this brief little book!I read through the reviews here before buying figuring that I could use the Chord Wheel but the rest of the book would be unhelpful. So many people said the same thing. I absolutely disagree! The 12 pages in this brief book cover more material, more simply and clearly, than anything else I have ever come across.Most books I have seen start with basics, and build on with excercises that I get lost in for lack of ability to see the big picture. What am I supposed to be learning? How does it all fit together? Why isn't this fun? I would have to practically earn a PhD in music before I would ever figure out how to be creative and actually enjoy playing music with most music instruction books.THIS book, on the other hand, is invaluable.The Chord Wheel itself, as everyone seems to agree, is really cool. Pick a key, play the chords within that chord family (found online or by looking them up in a separate chord reference guide) in any order or combination that appeals to you, and you sound good playing your instrument.The 12 pages of text are OUTSTANDING. The first time I read through it, I couldn't understand it at all. The second time, it took some concentration but I managed to comprehend everything. The third time, I understood it with less effort and it made just a little more sense. After the third time through I started asking questions - what about minor keys? There are minor keys, right? I read more closely and it all started clicking. I may not be able to teach it to someone else just yet, but every time I read it, it makes more and more sense. The thing is, it's only twelve pages, so you can read it in a short time.You don't have to master every concept to at least understand how it all fits together - and once you understand that, everything else is easier to learn. Chord progressions and analysis, circle of fifths, scales, modes - learn what that means here, and you'll have a strong conceptual foundation to get the most out of other music books - the ones I couldn't get through! I may revisit them, but there is enough here for me to work on (actually playing music, not reading and working through exercises), that I don't feel any urgency just now.Just give the book a chance. Read through it more than once. If you don't get it, you will if you keep at it. It actually isn't all that hard, really, it is just that people like me with a minimal to zero musical background are naturally going to have a hard time building a conceptual framework for undestanding the language of music.If you are looking for something to get you up and running, this is it! Combine it with chord reference charts or you won't be able to use it (if you can't play the chords!) but you can find that stuff online or at the library.