David Toop (born 1949) has been developing a practice that crosses boundaries of sound, listening, music and materials since 1970. This encompasses improvised music performance, writing, electronic sound, field recording, exhibition curating, sound art installations and opera. It includes eight acclaimed books, including Rap Attack (1984), Ocean of Sound (1995), Sinister Resonance (2010), Into the Maelstrom (2016), Flutter Echo, a memoir first published in Japan in 2017 (May 2019) and Inflamed Invisible: Writing On Art and Sound 1976-2018 (November 2019).