Arthur Horner wrote and illustrated children's fiction. He worked as a cartoonist for the Tribune, the News Chronicle, the New Statesman and the Age. He lived in Britain for a time and returned to Melbourne in the late 1960s. In addition to his books, Horner also contributed work to numerous Australian and international newspapers and journals, including the Bulletin, Smith's Weekly, the Daily Mail, Private Eye and Punch.
While living in Britain, Horner created the 'Colonel Pewter' comic-strip. The strip appeared in various papers for almost twenty years from 1952 and spawned two books, Colonel Pewter in Ironicus (1957) and Penguin Colonel Pewter (1978).
Horner returned to Melbourne in the late 1960s. His work spanned the genres of children's literature, satire, politics and social commentary.