Dizzy by Jonah Winter, illustrated by Sean Qualls

From chapters.ca:
This is the story of Dizzy Gillespie, a real cool cat who must have been born with a horn in his hands, judging from the way he played the trumpet. Jazz was his ticket on a train to better days, and he left his hard life in a small town for New York City and the hottest band around. But did Dizzy stand straight and play right? NO! He was a clown. He hit high notes, low notes, never-been-heard notes, and before he knew it, Dizzy created a whole new music: BEBOP. This is a story about a boy who breaks all the rules - and finds his own personal heaven along the way.

This book gets the tone of the words absolutely perfect for the subject.