At their home in Scotland, the Wylie family discovers that a young student has been entering their library undetected to take advantage of their immense collection of books. In exchange for his continued use of their resources, John Shand agrees to marry their daughter Maggie. What Every Woman Knows is a play by J. M. Barrie.

J. M. Barrie (1860-1937) was a Scottish novelist and playwright. Born in Kirriemuir, Barrie was raised in a strict Calvinist family. At the age of six, he lost his brother David to an ice-skating accident, a tragedy which left his family devastated and led to a strengthening in Barrie's relationship with his mother. At school, he developed a passion for reading and acting, forming a drama club with his friends in Glasgow. After graduating from the University of Edinburgh, he found work as a journalist for the Nottingham Journal while writing the stories that would become his first novels. The Little White Bird (1902), a blend of fairytale fiction and social commentary, was his first novel to feature the beloved character Peter Pan, who would take the lead in his 1904 play Peter Pan; or the Boy Who Wouldn't Grow Up, later adapted for a 1911 novel and immortalized in the 1953 Disney animated film. A friend of Robert Louis Stevenson, George Bernard Shaw, and H. G. Wells, Barrie is known for his relationship with the Llewelyn Davies family, whose young boys were the inspiration for his stories of Peter Pan's adventures with Wendy, Tinker Bell, and the Lost Boys on the island of Neverland.