Book excerpt: The publication of the first available English translation of composer and microtonal theorist Ivan Wyschnegradsky's Manual of Quarter-Tone Harmony. This seminal work, originally published in 1932, posits the composer's methodology and usage of quarter tones as a harmonic language.Produced with the permission of Association Wyschnegradsky (Paris, France) and Wyschnegradsky's heir Dmitri Vysneyev, this new edition is edited and with a foreword by Noah Kaplan and translated into English by Rosalie Kaplan.