Though English was the dominant Irish literary language in the twentieth century, much work of high quality appeared in Irish. A pioneering modernist writer in Irish was Pádraic Ó Conaire, and traditional life was given vigorous expression in a series of autobiographies by native Irish speakers from the west coast, exemplified by the work of Tomás Ó Criomhthain and Peig Sayers. Máiréad Ní Ghráda wrote numerous successful plays often influenced by Bertolt Brecht, as well as the first translation of Peter Pan, "Tír na Deo", and "Manannán", the first Irish language Science fiction book. The outstanding modernist prose writer in Irish was Máirtín Ó Cadhain, and prominent poets included Caitlín Maude, Máirtín Ó Direáin, Seán Ó Ríordáin and Máire Mhac an tSaoi. Prominent bilingual writers included Brendan Behan (who wrote poetry and a play in Irish) and Flann O'Brien. Two novels by O'Brien, "At Swim Two Birds" and "The Third Policeman", are considered early examples of postmodern fiction, but he also wrote a satirical novel in Irish called "An Béal Bocht" (translated as "The Poor Mouth"). Liam O'Flaherty, who gained fame as a writer in English, also published a book of short stories in Irish ("Dúil"). Irish-language literature continues to flourish in the modern day with Éilís Ní Dhuibhne and Nuala Ní Dhomhnaill being prolific in poetry and prose.