Jews have been a major presence in America's jazz, as musicians and as jazz facilitators, and in Kosher Jammers: Jewish Connections in Jazz – The USA, Gerber tells that story with a rigour worthy of academia but with a feature writer's creative flair. Besides drawing on a plethora of second-hand sources, Kosher Jammers is absolutely packed with first-hand material, from interviews, phone calls and emails with jazz figures, Jewish and otherwise –...