A Promise Born (Heartsong Presents)

is book #876 of the Heartsong Presents line. It was published while Heartsong Presents was owned by Barbour Publishing, Inc.
==Book Description==
Evelyn is done with promises.
Talk is cheap, Evelyn Happ declares. Her fiancé broke up with her days before their scheduled wedding, and her father seems to specialize in breaking promises. So in the midst of World War II, when the navy WAVES gives her the chance to get out of Washington, D.C., and contribute to the war effort, Evelyn can’t leave fast enough.
Mark Miller isn’t thrilled when the WAVES arrive to work on the navy’s top-secret project in Dayton, Ohio. He figures the distraction they cause doesn’t justify the assistance they provide. That is until a certain beautiful ensign starts offering suggestions that may provide the breakthrough the engineers need to succeed in their mission.
When the actions of a spy put both Mark and Evelyn under suspicion of betraying their country will the investigation make their relationship another casualty of war, or will it bring about the birth of a true promise of love?
(Description from fictiondb.com)