Edly's is for anyone, teen to adult, who wants to learn what's going on inside music. This includes players and singers of any level desiring a deeper appreciation of music-- rock 'n' rollers wanting broader musical horizons, jazzers needing more knowledge of chords and scales, theory students needing supplementary help, or classically trained folks wanting to branch into popular styles or to read from fake books. The 164 page soft-cover book begins by introducing notes, and moves quickly into scales, chords, keys, key signatures and intervals. Also included are modes, ear-training, figuring out music by ear, chord substitution, transposition, improvisation, and song forms. Each topic is accompanied by an explanation of what it is, how it's used, and why it is helpful.