"Cassette Culture - Homemade Music and the Creative Spirit in the Pre-Internet-Age" by Jerry Kranitz, published by VOD Records http://www.vodrecords.de/
From the VOD website: The book takes a social history/analytical approach to the growth of the global cassette culture/homemade music network that sprouted and flourished from the post-punk era through the early 1990s. The author explores how the participants communicated, traded, collaborated, and set up cottage industry labels to distribute their work. A long overdue study of this pivotal yet less than comprehensively documented chapter in the post-punk and 20th century independent arts movement stories.