Marcus Weeks is a musician, author, and editor. Music: A Crash Course, DK's Children's Illustrated Encyclopedia, and 1,000 Creators of the Millennium are among the books he has written or coauthored. He is the keeper of the Stanhope Collection of Historical Keyboards and has produced a number of works on music. Julian Rushton is an emeritus music professor at Leeds University in England. He has also served as president of the Royal Musical Association and has taught at the University of East Anglia and the University of Cambridge. Mozart: An Incredible Life, Mozart in the Master Musicians series, and Classical Music: A Comprehensive History are among his works.