This encyclopedia’s 30,000 entries cover all genres and periods of popular music from 1900 to the present day, including jazz, country, folk, rap, reggae, techno, musicals, and world music. The expanded Fourth Edition includes thousands of new entries on trends, styles, record labels, venues, and music festivals. Key dates, biographies, and further reading are provided for artists covered, along with complete discographies that include record labels, release dates, and a 5-star album rating system.