J.J. Johnson, known as the spiritual father of modern trombone, has been a notable figure in the history of jazz. His career has embodied virtually every innovation and development in jazz over the last half of the 20th century. In this comprehensive biography, filmography, catalogue of compositions and discography of J.J. Johnson, Berrett and Bourgois fill a gap in jazz studies. In its exploration of the various turning points in Johnson's life, The Musical World of J.J. Johnson offers a provocative and comprehensive declaration of the makings of a jazz legend. This analysis details Johnson's childhood and early education, documents his first compositions and examines his classical roots, thereby creating a powerful illustration of the composer's technical and stylistic development.