Jazz-Fusion is a book that describes and explains the changes that took place when jazz was blended with rock, folk, blues, soul, country and classical music. It's about a kind of music that has always been controversial but has now been mostly absorbed into the mainstream of popular music. After a brief outline of the history of jazz, Ken Trethewey describes the events that rocked the music world of the 1950s and 60s. He describes the processes by which the established style of jazz was broadened. Finally, he reviews the major contributors to jazz-fusion and provides an outline to some of the best music of its kind. The book is written at a basic level and so a glossary of relevant musical terms is provided. There is also an extensive discography and index.