(1) Michael (D.) O'Brien, b 1948, novelist, author of Father Elijah and the following series, as well as A Landscape with Dragons.
(2)Michael O'Brien the poet, b 1939, author of Sleeping and Waking and other works of poetry
(3) Michael O'Brien b 1950, photographer
(4) Michael O'Brien, b 1943, biographer and professor at University of Wisconsin-Fox Valley
(5) Michael O'Brien, b 1948, series editor of the Southern Texts Society, history professor at Cambridge
(6) Michael O'Brien, Runequest author
(7) Michael O'Brien, b. 1908, poet, To a Dark Moon
(8) Michael O'Brien, b 1965, author of Shorebird Guide
(9) Michael O'Brien, b 1965, Canadian playwright
(10) Michael O'Brien, b 1964, contemporary Christian singer
(11) Michael O'Brien, b 1947, author of Conscripts and Regulars
(12) Michael (J.) O'Brien, b 1953, author of Quicksilver
(13) Michael (F.) O'Brien, author of The Photographic Eye
Combination issues