46 books • 2 series
Book #1: Thirty MELLOW-dious Studies, Vol. 1-saxophone version
Book #1: Thirty MELLOW-dious Studies, Vol. 1-bass clef edition
Book #2: Thirty MELLOW-dious Studies, Vol. 2-Bass Clef
Book #2: Thirty MELLOW-dious Studies, Vol. 2-treble clef