A great collection of articles written by John Riley organized into three sections: Concepts, The Masters Speak, and The Chop Shop. "Concepts" explores time-keeping, groove, comping, soloing and odd times. Style and analysis Tony Williams, Elvin Jones, Billy Higgins and other greats is found in "The Masters Speak." Finally, "The Chop Shop" provides many unique ideas for getting your technique together. A great supplement to his popular book The Art of Bop Drumming!