Dizzy by Jonah Winter, illustrated by Sean Qualls.
Dizzy is a picture book biography of jazz great Dizzy Gillespie.  It is an amazing combination of language and picture, reading like poetry and looking like art.  It creates a mood, sustains it and teaches as it does it.   Read this book aloud or at least aloud in your mind to hear the rhythm, the jazz of the writing as it glides, dances and plays along just as Dizzy Gillespie did. 
This book caught me by surprise.  I tend not to like picture books about musicians because I think they often fail at trying to match the brief story and illustrations to the music that made the person famous.  But this one?  This one is one of the best musician biographies I have seen.  The illustrations add to the biography, informing readers of the time and place.  The text is gorgeously rich yet very simple like jazz itself.