Composition : a new approach, vol. 1

The goal of this book is to present several techniques that will make you more diverse, versatile, skilled composers.
These tools are limited intervals: writing with only two pitches; modulating scales: A modulating scale is a scale that begins in one key and, as it progresses, modulates to other key: writing with hexachords: Hexachords are six note scales that lay the groundwork for chromatic writing.
The book includes many diagrams and 27 audio examples on the accompanying CD.