After college, Nancy Barr Mavity taught philosophy at
Connecticut College,
New London, Connecticut. She is the author of
Hazard (an autobiographical novel),
A Dinner of Herbs (a volume of poetry dedicated to her daughter),
Responsible Citizenship (1923) (a textbook on American politics),
Shirley,
The Dangerous Road,
The Modern Newspaper (1930) (a history of newspaper journalism),
Sister Aimee (1931) (a biography of Aimee Semple MacPherson),
The State Versus Elna Jepson (1937) (a courtroom drama). She is the author of a series of mystery novels about crime reporter James Aloysius "Peter" Piper:
The Tule Marsh Murder (1929),
The Body on the Floor (1929),
The Other Bullet (1930),
The Case of the Missing Sandals (1930), ''The Man Who Didn't Mind Hanging
(1932), The Fate of Jane McKenzie'' (1933). She was a member of
P. E. N. Club,
National Woman's Party,
Phi Beta Kappa Society. ==Personal life==