The plays of Maria Martinez Sierra were popular in Spain, South America and in translation on Broadway and London's West End in the first half of the 20th century but they were thought to be written by her husband, the celebrated director and playwright Gregorio Martinez Sierra. After his death, the authorship of his work was revealed to be that of Maria, making her one of the most important playwrights of her time. This edited collection features three plays by Maria Martinez Sierra, translated by Helen and Harley Granville-Barker, along with an introduction by Patricia O'Connor, University of Cincinnati, US, which examines Maria's extraordinary life and work, and the battle for her authorship to be recognized in both the Spanish-speaking and anglophone world. This volume focuses on plays centred on strong women; and each is translated by the eminent man of theatre Harley Granville-Barker and his wife, Helen, whose own story holds stark parallels to Maria's in terms of authorship. The collection is edited by playwright Richard Nelson and Professor Colin Chambers, who contribute an essay on the translation work of the Granville-Barkers. The plays are: The Kingdom of God (1928); The Romantic Young Lady (1920) and Take Two From One (1931). Maria Martinez Sierra: A Great Playwright Hidden in Plain Sight recognizes Maria de la O Lejarraga Garcia, to use her birth name, as one of the most important female playwrights, not just in Spain, but globally, in the first half of the 20th century.