Rhythmic Composition documents Gavin's work with the popular progressive rock band Porcupine Tree. The book includes 20 highly detailed drum transcriptions by Terry Branam and in-depth commentary from Gavin Harrison taking you through the concepts of each song.

Included are some of Gavin's most legendary drum parts, including 'Blackest Eyes', 'Trains', 'The Sound of Muzak', 'Futile', 'Halo', 'Anesthetize', 'Nil Recurring', 'Cheating the Polygraph', and others.