Big Blue Soldier, The by Grace Livingston Hill (1865 - 1947)

Back from the Great War, a penniless and disillusioned young soldier finds himself in the home of Miss Marilla Chadwick, a sweet old lady who is expecting her nephew for dinner. Mary Amber, Miss Marilla's neighbor, is also there. He hates girls. She hates men. What will be the result? He will fight girl in the concrete! - Summary by LikeManyWaters