Ed Lacy is the author of the mystery novel Sin in Their Blood. The main character of the story is Matt Ranzino who is a former boxer, police officer, and private investigator. After returning from the Korean War and recovering from tuberculosis. Matt engaged himself in investigating a murder in his hometown.
His ex-partner who is now a blackmailer, a seductive blonde from his past, and a lady connected to the murderer are among the people he meets along the road. The first edition of the book was published on 21 April 2013.