Mysteries of known American writer Mary Roberts Rinehart include

The Circular Staircase (1908) and The Door (1930).

People often called this prolific author often the American version of Agatha Christie. She, considered the source, used not the phrase "The butler did it," and people also consider that she invented the "Had-I-But-Known" school of mystery writing.

Rinehart wrote hundreds of short stories, poems, travelogues, and special articles. People adapted many of her books and plays for movies, such as The Bat (1926), The Bat Whispers (1930), and The Bat (1959). Amid many of her best-selling books, critics most appreciated her murder mysteries.

https://en.wikipedia.org/wiki/Mary_Ro...