The thing about GGA covers is they often mislead in terms of written content. The dove in The Frightened Dove is not the femme fatale on the cover but rather a Mussolini underling named Colombo—Italian for dove—who’s hunted by the hero Ricci Bartoli, a retired anti-fascist fighter dragged out of his peaceful life as a tailor in New York City. Colombo is after a trove of gold, and Bartoli is out to stop him, with the crucial action taking place in Montreal. You can always tell there’s something French about a book when the cover femme is wearing a beret. And her name is Marie, which seems to be the go-to for French women in genre fiction. The story here fits squarely into the post-war political adventure niche—i.e. cleaning up the loose ends of World War II. And on the subject of pseudonyms, Hardin was actually a Hungarian author named Louis Vaczek. The Frightened Dove was originally published in hardback in 1951, with the above Bantam paperback arriving in 1952 with uncredited cover art.
Actually, that's more than enough money, lover. You're under arrest.