Book excerpt: Here published for the first time, is the final book written by the late Hans Lenneberg, respected scholar and longtime head of the music library at the University of Chicago. In it, the author pursues the impact of printing technologies, methods of distribution, government regulations, and evolving business practices as they affect music and musical life. Written with insight and humor, this book surveys a changing industry, century by century, pulling together information from many specialized studies and pointing out previously unnoticed trends and remaining puzzles.