Gilbert Morris 
Gypsy Moon (House of Winslow Book #35) 

Dr. Gabrielle Winslow joins the Underground in Holland to help smuggle Jews out of the country, but she is stunned when the new commander of the Nazi occupation forces turns out to be Col. Erik Raeder, a man she had nearly agreed to marry when she spent time with her uncle in Berlin. Gabrielle teams up with a handsome OSS agent to rescue her uncle.Will they succeed in bringing him out of Germany only to be trapped in Holland by the jilted Nazi colonel? House of Winslow Book 35.