Michael Innes was the pseudonym of John Innes MacKintosh (J.I.M.) Stewart (
J.I.M. Stewart).
He was born in Edinburgh, and educated at Edinburgh Academy and Oriel College, Oxford. He was Lecturer in English at the University of Leeds from 1930 - 1935, and spent the succeeding ten years as Jury Professor of English at the University of Adelaide, South Australia.
He returned to the United Kingdom in 1949, to become a Lecturer at the Queen's University of Belfast. In 1949 he became a Student (Fellow) of Christ Church, Oxford, becoming a Professor by the time of his retirement in 1973.
As J.I.M. Stewart he published a number of works of non-fiction, mainly critical studies of authors, including Joseph Conrad and Rudyard Kipling, as well as about twenty works of fiction and a memoir, 'Myself and Michael Innes'.
As Michael Innes, he published numerous mystery novels and short story collections, most featuring the Scotland Yard detective John Appleby.