This book is a study of a crucial period in the life of American jazz and popular music. Pearl Harbor Jazz analyses the changes in the world of the professional musician brought about both by the outbreak of World War II and by long-term changes in the music business, in popular taste and in American society itself. It describes how the infrastructure of American music, the interdependent fields of recording, touring, live engagements, radio and the movies, was experiencing change in the conditions of wartime, and how this impacted upon musical styles, and hence upon the later history of popular music. Successive chapters of the book examine the impact of these changed conditions upon the songwriting and music publishing industries, upon the world of the touring big bands, and upon changing conceptions of the role of jazz and popular music. Not only the economic conditions but also ideas were changing; the book traces a movement among writers and critics which created new definitions of 'jazz' and other terms that had a permanent influence on the way musical styles were thought of for the rest of the century. The book deals in some depth with the work of a number of important artists in these various fields, including, Duke Ellington, Charlie Parker, Johnny Mercer and Frank Sinatra, looks at the growing presence of bebop, the rise of country music, and the contemporary musical scenes in such locations as New York and Los Angeles. The book combines detail of the day to day working lives of musicians with challenging views of the long-term development of musical style in jazz and popular music.