Ruth Cranston (pseudonym, Anne Warwick; November 14, 1887 – April 2, 1956)[1] was an American author and lecturer on religion and other subjects.

She was taught by tutors in France and Switzerland, and traveled frequently with her family on her father's missionary work.

Cranston returned to the United States in 1919, after working for close to a year with the Red Cross, and by this time apparently divorced.

Her books published under her own name, which came in her later years, focused on non-fiction and religious subjects, including a biography of Woodrow Wilson (Cranston had gone to college to Wilson's daughters), a history of major religions (World Faith),[10] and The Miracle of Lourdes (1955) about the Our Lady of Lourdes shrine.

She lived in Sierra Madre, California in her later years, and died at St. Luke's Hospital on April 2, 1956, while on a lecture tour.