What novel written by an Irish novelist, playwright and satirist,  who wrote under the pseudonym Flann O'Brien, was published by MacGibbon & Kee in 1967?
Brian O'Nolan Brian O'Nolan (Irish: "Brian Ó Nualláin" ; 5 October 1911 – 1 April 1966) was an Irish novelist, playwright and satirist, considered a major figure in twentieth century Irish literature. Born in Strabane, County Tyrone, he is regarded as a key figure in postmodern literature. His English language novels, such as "At Swim-Two-Birds", and "The Third Policeman", were written under the "pen name" Flann O'Brien. His many satirical columns in "The Irish Times" and an Irish language novel "An Béal Bocht" were written under the name Myles na gCopaleen.
William Kirkpatrick Magee William Kirkpatrick Magee (16 January 1868 – 9 May 1961), was an Irish author, editor, and librarian, who as an essayist and poet adopted the pen-name of John Eglinton. He became head librarian of the National Library of Ireland, after opposing the "cultural nationalism" of his time. From 1904 to 1905 he edited the literary journal "Dana" and was the biographer of George William Russell ("Æ").