Orrin Keepnews has a rare double perspective on jazz. He has been writing about this music for four decades, and for almost that long he has been one of its most active and highly regarded record producers. He has won three Grammy Awards (one as producer, and two for album notes), was founder of two legendary jazz labels of the '50s and '60s (Riverside and Milestone), was managing editor of The Record Changer magazine, and has written countless album...