If Benny Goodman was the “King of Swing,” then Fletcher Henderson was the power behind the throne. Not only did Henderson arrange the music that powered Goodman’s meteoric rise, he also helped launch the careers of Louis Armstrong and Coleman Hawkins, among others. In Fletcher Henderson and Big Band Jazz: The Uncrowned King of Swing, Jeffrey Magee offers a fascinating account of this pivotal bandleader, throwing new light on the emergence of modern jazz and the world that created it.