Ion Courtenay Gill Trewin (13 July 1943 – 8 April 2015) was a British editor, publisher and author.
[1] He was the literary editor of The Times from 1972 to 1979 and then became an editor with Hodder & Stoughton (for whom he published Thomas Keneally's Schindler's Ark in 1982) until 1992 and Orion Publishing Group to 2006.
He was said to have "an unmatched reputation as a publisher of taste and acumen".
[1] He was director of the Man Booker Prize for a decade and was the biographer of the politician Alan Clark.
[1][2][3][4][5] Trewin also edited the three volumes of Clark's diaries.