Billy Boyle World War II mysteries

What’s a twenty-two-year-old Irish American cop who’s never been out of Massachusetts before doing at Beardsley Hall, an English country house, having lunch with King Haakon of Norway? Billy Boyle himself wonders. Back home in Southie, he’d barely made detective when war was declared. Unwilling to fight—and perhaps die—for England, he was relieved when his mother wangled a job for him on the staff of a general married...

Praise for the Billy Boyle series:
“The brash kid from Southie is still open, direct and fearless in his manner (and in his wonderfully loose-jointed use of the English language) and in no danger of losing his cover as a ‘happy-go-lucky Yank.’ But even amid the excitement of the spirited wartime storytelling, Benn allows Boyle’s experiences to change him in ways both subtle and dramatic.”—Marilyn Stasio, The...

"Uncle Ike" (aka General Eisenhower) personally pins silver first lieutenant bars on Billy Boyle in Benn's stellar fifth WWII mystery (after 2009's Evil for Evil). In December 1943, Billy's leave with his British girlfriend in Italy is cut short. Orders send him to London to look into a Soviet officer's shooting murder, which may be retaliation for the execution of thousands of Polish officers in the Katyn Forest that's been blamed on the Germans...

"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. An American monsignor is found murdered at the foot of Death's Door, one of the five entrances to Saint Peter's Basilica. Wild Bill Donovan, head of the OSS, wants the killing investigated....

"When an unidentified corpse washes ashore at Slapton Sands on England's southern coast, US Army Captain Billy Boyle and his partner, Lieutenant Piotr 'Kaz' Kazimierz, are assigned to investigate. The Devonshire beach is the home to Operation Tiger, the top-secret rehearsal for the approaching D-Day invasion of Normandy, and the area is restricted; no one seems to know where the corpse could have come from. Luckily, Billy and Kaz have a comfortable...

Billy Boyle, World War II US Army detective and ex-Boston cop, faces his toughest investigation yet: infiltrating enemy lines in France as the Allies invade Normandy.
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...

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 been found dead in a manor house serving as an advance headquarters outside the town of Trévières. Major Jerome was far...

England, 1944: Recovering from physical and psychological wounds sustained in the liberation of Paris, US Army detective Billy Boyle and Lieutenant Kazimierz are sent to a convalescent hospital in the English countryside—only to discover that St. Albans may have its own war secrets, including a killer.
"As historical detective series go, this one is extremely well tended by an author who clearly dotes on his hero....

US Army Captain Billy Boyle plunges into partisan warfare alongside betrayed French Resistance fighters in his seventeenth WWII investigation.
Southern France, 1944: Ex-Boston cop and wartime military investigator Billy Boyle is given a dangerous assignment—to extract a British Special Operations Executive officer from Crete and take him to France to serve on a security detail to identify fascist sympathizers. The mission gets even...