New York: J. J. Robbins & Sons, (1949). First edition. Paperback original. Three sections telling the "When," "How," and "Who" of Be-Bop. Profusely illustrated with black-and-white photographs; includes 25-page "biographical index" of musicians; table of original compositions using chord sequences originating in well-known songs; a few musical score examples; and more. Red, white and black paperwraps. Covers are good with spine completely faded (or perhaps was blank), light soiling and edges toned. Interior is fine.