Murder at the 42nd Street Library opens with a murder in a second floor office of the iconic, beaux-arts flagship of the New York Public Library. Ray Ambler, the curator of the library's crime fiction collection, joins forces with NYPD homicide detective Mike Cosgrove in hopes of bringing a murderer to justice. In his search for the reasons behind the murder, Ambler uncovers hidden--and profoundly disturbing--relationships between visitors to the library. These include a celebrated mystery writer who has donated his papers to the library's crime fiction collection, that writer's missing daughter, a New York society woman with a hidden past, and one of Ambler's colleagues at the world-famous library. Those shocking revelations lead inexorably to the tragic and violent events that follow"