This book describes some rules that I came up with and follow when I am composing music. These rules could apply to any tuning system such as my own Eagle 53 tuning and other alternative tunings. There is also a list of what I consider to be good harmony and melody intervals over a six octave range. The book is aimed primarily at people who use alternative tunings (i.e. tunimgs that are different to the standard Western musical tuning: 12 Tone Equal Temperament). Be warned that there are only 22 pages of text in this book, the other 77 pages list 96 scales and 2196 ‘legal’ melody and harmony intervals.