Senior homicide detective Frank Spencer bears the scars of many battles with his superior officers and a failed marriage. Dealing with his personal demons, Frank struggles to hold on to the one thing he has left: his career. Assigned to a new case, Frank is teamed up with general investigations detective Mike Estrada. Young and eager, Mike has his own problems trying to navigate the minefield of detective work while keeping his family life from falling apart. The pair soon find themselves following a trail of clues in pursuit of a vicious serial killer. But the demands of working on the case take a toll on the detectives as they confront many obstacles in dealing with family, the department, and even with each other.

David Thomas has dedicated thirty-four years of his life to serving the criminal justice system in Pima County, Arizona. Drawing on his extensive history as a detective, detective sergeant, probation officer, and defense investigator, David creates this novel that was ten years in the making. David and his wife, Karen, live in Tucson where their daughter, Elaine, currently attends the University of Arizona. The Gordian Knot is David's first published novel.