J.J. Connolly is the writer of the crime novel, Layer Cake, and of the screenplay of the film based on it. He is currently writing a sequel to Layer Cake; in a 2005 interview, Matthew Vaughn (who directed the film adaptation of the original novel) explained that, "The concept of the novel is that [XXXX] moves to the Caribbean" and "[XXXX and a friend] take over the Caribbean drug business." Cinema Confidential News: 05/11/05 - INTERVIEW: Matthew Vaughn on "Layer Cake," "X-Men 3"
Before becoming a novelist Connolly was a guitarist in the London-based band, Combo Nation.