The Coldest Case: A Black Book Drama is a prequel to James Patterson’s The Black Book. While that might give readers insight into the Audible project, we do know a little more information. The Coldest Case follows Bill Harney, a homicide detective who sends his partner Kate undercover to investigate a drug ring. Bill’s decision to suddenly pull her out causes Kate’s to cover to get blown, and their investigation is subsequently tanked. Kate’s informant disappears along with the drug ring, and the eponymous “black book.” Another investigation ensues, and it uncovers an elaborate web of criminal activity.