Title: Thesaurus of scales and melodic patterns
First published: 1947
Description: Simply stated this book is a "how" process to creating and improvising music and in so doing answers that inevitable question of "why?" Why is something not working or why does it work? By playing the examples ( of which there are more than a thousand) ones ear is developed to new levels of sensitivity giving  a composer or player nearly limitless material from which to create.  I highly recommend it.
Subjects: Musical intervals and scales, tone patterns, harmonic progressions