This book describes 507 chords whose notes conform to a ‘Melodic Base’ which is built around the Arabian scale in the author’s alternative musical tuning: Eagle 53. The Arabian scale looks like this… E, F, G#, A, B, C, D#, E. The idea is that all of the notes in all of the chords listed pair nicely with one another melodically which means that any and all chord progressions using only these chords should sound sweet. The chords are suitable for guitars fretted for the Eagle 53 tuning and for pianos and keyboards tuned to Eagle 53. Many chords in this book are not suitable for guitars with a regular fret arrangement or for pianos or keyboards tuned to the standard Western tuning: 12 Tone Equal Temperament.