"A landmark in jazz studies, 'Thinking in Jazz' reveals as never before how musicians, both individually and collectively, learn to improvise. Chronicling leading musicians from their first encounters with jazz to the development of a unique improvisatory voice." Amazon description.
A worthwhile read for every jazz student for the first hand recounting from master jazz musicians on how they learned to improvise.
You've got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail.
I'm a professional pianist and music educator in West Toronto Ontario. I'm also a devoted percussionist and drum teacher.