Here the mystery of WHY "a root moving up a perfect 4th is the strongest motion in all music" is examined in meticulous detail. This short treatise is an in-depth look into the enigmatic root motion of the ascending 4th, as well as its real-world consequences. If you're a music theory buff, and you'd like to get down into the nitty gritty of the basis for all tonal musics, you need to have this book in your collection