Lucifer's Falcon: A Secret Agent Superhero Novel

It is 1936, and newlyweds Luce and Catrin have a secret. They are on a mission to rescue two men from two European castles. From the coast of Spain to the French Riviera to a high castle in snowy Bavaria, these American secret agents tangle with Spanish fascists, Nazi thugs, and monstrous men with super human powers. Catrin and Luce have their own surprising superpowers. Did they just stumble on a stone with incredible power? Can they pull off these rescues and make it out alive to continue...