Microtonality in 55 Keys

My first book, an introduction to the generalised keyboard, the Bosanquet-Wilson hex layout, a run-down on intervals and the chain of fifths, distances on the keyboard, building, playing and creating with scales and chords and their rotations, and information about various tunings, and comparisons between many equal temperaments up through 94, alongside JI ratios up through the 43-odd-limit. Features a generalised notation and colour system so that structures can be mapped between many different tunings.
 
First digital edition. December, 2020. Currently available through my blog post about the book here.