Not a summary. The actual first two chapters of Beginner Music Theory, word for word: how the fretboard actually works, and how to build any chord in any key without looking up a shape. Sent straight to your inbox.
How the twelve notes actually work, the fastest way to learn the whole neck through octave shapes, and the reference points most players never think to use.
The actual distance between any two notes, and the three simple recipes that build every major, minor, and diminished chord in any key, without looking up a shape.
This isn't a highlight reel. It's the actual first two chapters of the book, so you can judge for yourself whether the rest is worth your time before you spend a dollar on it.