Hello everyone,
Reading this thread, I couldn't help but sign up to this forum (having been following passively for a long time). If you dug the documentary, I sure you will love the excellent biography on Joe that has been out for a couple of years and that didn't get the attention it very much deserves.
'In a silent way' A portrait of Joe Zawinul, by Brian Glasser
The chapter on Joe's youth especially were very insightful to me as to how he became the person that he world got to know (and that some of you talked about above). The book even has a short foreword by Wayne.
All in all, a seemingly well-researched book that I can only recommend.
Cheers!
ensho