A Doctor in the House Paperback

They're supposed to be allies, but mutual distrust puts this pair on opposite sides.

Emma O'Sullivan is one of the first female doctors to enlist after President Franklin Roosevelt signs the order allowing women in the Army and Navy medical corps. Within weeks, Emma is assigned to England to set up a convalescent hospital, and she leaves behind everything that is familiar. When the handsome widower of the requisitioned property claims she's incompetent and tries to get her transferred, she must prove to her superiors she's more than capable. But she's soon drawn to the good-looking, grieving owner. Will she have to choose between her job and her heart?

Archibald "Archie" Heron is the last survivor of the Heron dynasty, his two older brothers having been lost at Dunkirk and Trondheim and his parents in the Blitz. After his wife is killed in a bombing raid while visiting Brighton, he begins to feel like a modern-day Job. To add insult to injury, the British government requisitions his country estate, Heron Hall, for the U.S. Army to use as a hospital. The last straw is when the hospital administrator turns out to be a fiery, ginger-haired American woman. She's got to go. Or does she?