Mumbo Jumbo by Ishmael Reed
Mumbo Jumbo is a 1972 novel by African-American author Ishmael Reed. Set in 1920s New York City, the novel takes its plot from the struggles of "The Wallflower Order," an international conspiracy dedicated to monotheism and control, to contain the "Jes Grew" virus, a personification of ragtime, jazz, polytheism, and freedom. The Wallflower Order is said to work in concert with the Knights Templar Order to prevent people from dancing, and their current goal is to put an end to the dance crazes which are spreading among black people (who are referred to in the novel as "Jes Grew Carriers" or "J.G.C.s").