Lehane, Cornelius. 42nd Street Library mystery

"Hardboiled crime writer Will Ford might be critically acclaimed, but he's every bit as debauched and disreputable as the ne'er-do-well private eye in his novels. So when Ford offers Raymond Ambler - crime-fiction curator at New York City's prestigious 42nd Street Library - a collection of his papers, Ambler wonders if the project will be more trouble than it's worth. Still, the disgraced author is an important talent, and Ambler's never been afraid of a fight. Ambler's ready for the controversy that greets news of the acquisition. He's not ready, however, for what he finds when he finally receives the papers: a gripping unpublished short story apparently based on a real case, with an explosive author's note. If it's true, there's been a shocking coverup at the heart of the NYPD - and a cop has got away with murder. If it's true. Ford's not talking, and Ambler's good friend Mike Cosgrove, a veteran NYPD homicide detective, is beyond skeptical. But as the pair investigate, they're drawn into the sordid underbelly of 1990s New York, packed with renegade cops, thugs and mobsters . . . and they'll be lucky to come back out alive."--