The Slonimsky Thesaurus of Scales and Melodic Patterns is classic music literature. Jazz musicians particularly should find this text, because the text leads to ideas in understanding improvisation. Jazz musicians emphasize that John Coltrane studied this text in enahncing his improvisational genius. I studied music at Musicians' Institute in Los Angeles California. I then formally studied Jazz Guitar as a Music Major at the University of Southern California. As a child, I studied classical guitar at the Conservatory of the Arts in St. Louis, Missouri. I performed as a professional musician throughout the 1980's and 1990's. I enjoyed the opportunity to work as a studio musician during this time, and this text definitely helps improving one's improvisational skills or "Chops." Study Slonmisky. I would suggest not to simply read the text, but study it.