Untitled Tony Accardo/Sam Giancana Biopic

Under Mann’s new venture, Michael Mann Books, the prequel will begin as a novel, and possibly be adapted into a film or television series. Just two days after that announcement, another project from Michael Mann Books is in the works: author Don Winslow (Savages) is writing a novel about Chicago crime boss Tony Accardo and his successor Sam Giancana, which Mann might adapt into a feature film.