Complete Encyclopedia of Scales by Charles Colin. The most complete practical scale theory book on the market. In treble clef, but intended for every instrument, including trumpet, trombone, tuba, and french horn.

From the author’s forward:

Attention: Teachers

Present your students with excitingly new scale studies. The Encyclopedia of Scales contains the historical background and the diagramatic con- struction of many exotic scales. The International Scale Reference provides additional...