US Army Lieutenant Billy Boyle, an ex-cop who serves as detective for General Ike, is sent to Caserta, Italy, to investigate the murders of two American officers stationed there. The MOs are completely different, and it seems like the officers had no connection to each other, but one frightening fact links the murders. Each body was discovered with a single playing card: the lieutenant’s with the ten of hearts; the captain’s, the jack of hearts. The message seems clear—if the murderer isn’t apprehended, the higher ranks will be next. 

Lieutenant Billy Boyle could have used a rest after his last case, but when his girlfriend, Diana Seaton, a British spy, goes missing in the Vatican, where she was working undercover, he insists on being assigned to a murder investigation there so he can try to help her.

March, 1944: US Army Lieutenant Billy Boyle, back in England after a dangerous mission in Italy, is due for a little R&R, and also a promotion. But the now-Captain Boyle doesn't get to kick back and enjoy his leisure time because two upsetting cases fall into his lap at once.

When an unidentified corpse washes ashore at Slapton Sandson England's southern coast, US army captain Billy Boyle and his partner, Lieutenant Piotr "Kaz" Kazimierz, are assigned to investigate. The Devonshirebeach is the home to Operation Tiger, the top-secret rehearsal for theapproaching D-day invasion of Normandy, and the area is restricted; no one seems to know where the corpse could have come from.

In 1943, in the midst of the brutal, hard-fought Solomon Islands campaign between the Allies and the Japanese forces, Lieutenant Billy Boyle receives an odd assignment. He’s sent by the powerful Kennedy family to investigate a murder in which PT skipper (and future president) Jack Kennedy has...

May 1944: Captain Billy Boyle is convicted on spurious charges of black market dealings—stripped of his officer’s rank, reduced to private, and sentenced to three months’ hard labor. But Billy is given an opportunity: if he takes on the incredibly dangerous mission of investigating a set...

Europe, 1944: Captain Billy Boyle and his friend Lieutenant Piotr “Kaz” Kazimierz are sent to neutral Switzerland to work with the Office of Strategic Services (OSS), investigating Swiss banks that are laundering looted Nazi gold. The US and Swiss governments are about to embark on...

US Army detective Billy Boyle is called to investigate a mysterious murder in a Normandy farmhouse that threatens Allied operations. July, 1944, a full month after D-Day. Billy, Kaz, and Big Mike are assigned to investigate a murder close to the front lines in Normandy. An American officer has...

In the 14th Billy Boyle mystery, US Army detective Billy Boyle and Lieutenant Kazimierz travel into the heart of Nazi-occupied Paris on a dangerous mission: ensure a traitor to the French Resistance unwittingly carries out a high-stakes deception campaign. August, 1944: US Army detective Billy...

Just days after the Liberation of Paris, US Army Detective Billy Boyle and Lieutenant Kazimierz are brought to Saint Albans Convalescent Hospital in the English countryside. Kaz has been diagnosed with a heart condition, and Billy is dealing with emotional exhaustion and his recent...

Billy Boyle is sent to the heart of the USSR to solve a double-murder at a critical turning point in the war in this latest installment of critically acclaimed James R. Benn’s WWII mystery series. It’s September 1944, and the US is poised to launch Operation Frantic, a shuttle-bombing...

Southern France, 1944: What should be a simple assignment with a Special Operations Executive officer gets complicated quickly as Billy navigates the tensions between Resistance groups in the process of gathering information on Vichy officials and other collaborators who escaped with the retreating Germans. Unexpectedly, the SOE officer has many enemies in the Resistance, linked to the failed Vercors uprising. With sacrifice and betrayal afoot, Billy doesn’t know who he can trust, or how close to death this case may bring him.

Norfolk, England, November 1944: After a series of dangerous missions in the South of France, US Army Captain Billy Boyle is finally on leave, and is settling into a peaceful rest at the country estate of Sir Richard Seaton, the father of Billy’s British lover, Diana. Seaton Manor is a comfortable haven, and Billy is eager to spend a few precious days in Diana’s company pretending the war is far away.

Winter 1944: Months after the Liberation of France, ex-Boston cop Billy Boyle finds himself in a Paris reeling from the carnage it has endured but hopeful that an end to war is in sight. When Billy finds a rare piece of artwork after a tense shoot-out in the Père Lachaise Cemetery, he thinks it could be connected to the Syndicat du Renard, a shadowy network of Nazi sympathizers known to be smuggling stolen artwork out of France. Trailing the Syndicat, Billy discovers that someone with a high level of communications clearance may be using his position to aid the thieves.

Christmas Day 1944: After his last mission put him in the tailspin of the Battle of the Bulge, Captain Billy Boyle travels to southeast England to visit his girlfriend, Diana Seaton, for a brief holiday respite. Diana is engaged in classified work at RAF Hawkinge, including Operation Corona, which recruits German-speaking Women’s Auxiliary Air Force members—many of them Jewish refugees from the Kindertransport rescue—to countermand German orders and direct night fighters away from Allied bombers.