Brian O'Nolan (Irish: Brian Ó Núalláin) (October 5, 1911 - April 1, 1966) was a twentieth century Irish novelist and satirist, best known for his novels An Béal Bocht, At Swim-Two-Birds and The Third Policeman written under the nom de plume Flann O'Brien. He also wrote many satirical columns in the Irish Times under the name Myles na gCopaleen.
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Novelist and journalist Keith Donohue is the author of The Stolen Child and The Irish Anatomist: A Study of Flann O'Brien.