Gavin Harrison is a British drummer and percussionist. He is best known for playing with the British progressive rock band Porcupine Tree which he joined in 2002. As of 2011, he also plays with the band King Crimson. Harrison has authored two instructional drum books entitled Rhythmic Illusions and Rhythmic Perspectives. He also wrote and produced his own instructional DVDs, Rhythmic Visions and Rhythmic Horizons, at his home studio. 2010 saw the release of Rhythmic Designs, a book of transcrip...