I love the illustrations. I like the idea of picture book biographies, especially more multi-cultural ones. From what I read, he certainly seems to have been a ground-breaking musician, so perhaps this book will help him become more well-known.  I know I don’t have a huge musical background, but even the illustrator mentions in his note in the back that he was unfamiliar with Esquivel’s music as well, so it makes me wonder how many of my elementary students will bother to pick it up.  I’m afraid its readership may be limited.  And one fault I think will make it harder for those who do to wrap their heads around:  there’s no indication in the body of the text to give a time frame context to the musician’s life and work.  A reader needs to read carefully in the end note (which few elementary students do) in order to place the bulk of his career in the 1960s.