Founder of Staalplaat and Staalplaat Soundsystem, Geert-Jan Hobijn is 'an open-minded, enthusiastic artist with a boundless curiosity. Fascinating by sound and space and making use of pedestrian materials, Geert-Jan is constantly devising new creations to use in his experiments.' This book shows some of his work through several photos, an introduction by Douglas Kahn, an essay by Jorinde Seijdel. Plus a single 7" with locked grooves that you can play manually or with a turntable, and a small electronic device that reacts to light.