New Book Alleges John F. Kennedy Was Involved in Love Triangle With Adolf Hitler and Danish Woman

President John F. Kennedy was once locked in a steamy love triangle with diabolical Nazi dictator Adolf Hitler, according to shocking allegations in a new book.

In the recently released JFK: Public, Private, Secret, sources say the King of Camelot had a torrid affair with a stunning Danish woman, who had also caught the eye of the devil that plunged the globe into World War II and sent 85 million people to their graves.

J.Randy Taraborrelli, the biography’s author, writes that Inga Arvad was already an accomplished femme fatale by the time she met the 24-year-old future president in Washington, D.C., in October 1941.

The blond bombshell — who was four years older than JFK — was crowned Miss Denmark at 16 and named a finalist in the Miss Europe beauty pageant. She eloped with Egyptian diplomat Kamal Abdel Nabi at 17, divorced him two years later, then married Hungarian movie director Paul Fejos and starred in two of his films.

Bored with acting, Inga parlayed her good looks and social connections into a job at Denmark’s largest newspaper — and scored a scoop in covering Hitler flunky Hermann Goering’s engagement.

At the 1935 wedding, she met Hitler and was so entranced by the tyrant that he later sat for as many as three interviews with her.

Inga even accompanied the psychotic despot to the 1936 Olympics in Berlin, sitting in his private box and accepting a personal photo Hitler gave her of himself.

According to Hitler, Inga was “the most perfect example of Nordic beauty,” Taraborrelli writes, and she was courted to be a spy for his Third Reich. Sources say despite Hitler’s long romance with Eva Braun — who attempted to take her own life in May 1935 because her cruel companion wasn’t making enough time for her  — he admitted to his closest aides that Arvad was his first true love.

However, Inga was alarmed by the brute’s infatuation and fled to America — where she attended the Columbia School of Journalism in New York and took a job with the Washington Times-Herald, penning the celebrity column Did You Happen to See?

While at the paper, she shared an apartment with fellow staffer Kathleen “Kick” Kennedy — JFK’s reporter sister — who introduced Inga to Jack, then a dashing ensign with the Office of Naval Intelligence.

The pair hit it off instantly with Inga’s son Ron McCoy — one of Arvad’s two kids with Hollywood cowboy Tim McCoy, her third and final husband  — telling Taraborrelli: “It was pretty much love at first sight.”

However, Inga had also caught the attention of FBI Director J. Edgar Hoover, who put her under surveillance as a suspected Nazi spy.

The torrid affair enraged Jack’s domineering father, Joe — a former U.S. ambassador to England — who believed the scandalous romance would doom his second-born son’s chances for political stardom.

According to Taraborrelli’s book, Joe ordered Jack to dump the “Nazi b**ch,” as he called her.

The Navy — fearing Arvad was a spook — demoted Jack to a desk job in Charleston, S.C., booting him from Navy intelligence and prohibiting him from traveling more than 30 miles from his new base.

The humiliating transfer, however, did little to dissuade the young buck from dating enchanting Inga, sources say.

Soon, the pair were spending long weekends in bed together at Charleston hotels and sightseeing around the city, according to G-men who tailed them and wiretapped her phone.

Jack, meanwhile, playfully referred to Arvad as Inga Binga, and the couple seriously discussed marriage — even though she had yet to divorce Fejos.

Ultimately, Joe prevailed and forced Jack to end the affair in March 1942 — five months before the FBI concluded its investigation and found Inga innocent of espionage.

Disturbingly, a diary entry penned by JFK in 1945 sang Hitler’s praises — with a BBC report saying Kennedy boasted that his former love rival “had in him the stuff of which legends are made” and predicting he’d emerge as “one of the most significant figures who ever lived.”

According to sources, Jack never forgave his father for running off the love of his life and carried the grudge to his grave in November 1963, when he was gunned down in Dallas, Texas.

“After Inga, Jack changed,” Kennedy expert and presidential historian Leon Wagener tells Globe. “He became far less romantic, even remote to women — and, eventually, came to view them only as sexual objects.

“It was a wound that never quite healed — even after he married Jackie.”