But Cavanagh's "Thirteen" is no gimmick. It's a superb action-packed story that melds the legal thriller with the serial killer subgenre, featuring intriguing character studies of both heroes and villains and a perceptive look at the legal system.
Eddie sees a lot of similarities between his old life as a con man and his career as a lawyer, especially in dealing with juries. But the main difference is that Eddie is now scrupulously honest, willing to take on anyone, including corrupt cops. As a result, his practice is rather low-rent. His apartment is his office, and he advertises on the side of a hot-dog cart. He's stunned when high-powered attorney Rudy Carp wants him to join the team defending up-and-coming actor Bobby Solomon, who's accused of killing his wife, the popular actress Ariella Bloom, and Carl Tozer, the couple's chief of security. The victims were found murdered in bed in the actors' Manhattan home.
Although the evidence suggests that Bobby killed them in a jealous rage, Eddie believes his client may be innocent, while also recognizing that the young man is a gifted actor. But a brilliant defense may not be enough to get an acquittal. Joshua Kane, a serial killer, has targeted the trial and goes about dispatching would-be jurors until he gets to be an alternate — number 13 — though that doesn't last long. Once actually on the jury, he will make sure to get a guilty verdict — by any means.
Irish author Cavanagh nails the New York vibe while illustrating an affinity for American legalese. Cavanagh delves deep to show how Kane manipulates the jury and how he has stayed under the radar of law enforcement for years. The number 13 becomes a chilling totem as Eddie begins to put together evidence and clues. "Thirteen" seamlessly alternates from the viewpoints of Eddie and Kane. Cavanagh shows how the highly intelligent Kane became a killer, yet the author never wants the reader to feel empathy or sympathy for him. Kane's self-assuredness makes him forget the rule of never conning a con man.
Sharp dialogue, court scenes that crackle, well-devised red herrings and deeply sculpted characters make "Thirteen" an outstanding thriller.