Along with the books, there are interactive applications that not only help create music, but understand it.
Polychords
Frequency Visualizer
Interval Visualizer
Harmonics Visualizer
They are constantly being updated,
and more are on the way :)
All books include example videos to listen to and bring the explanations to life.
For all instruments —Harmonic and melodic. Not just for guitar or piano.
No sheet music —Everything is explained visually with diagrams, arrows, and colors.
Permanent access + updates —Buy once and receive all future versions.
Self-explanatory diagrams —The graphics speak for themselves, but each one includes a written explanation.