He began writing crime fiction while waiting for his patients and in 1921 paid for the publication of his first novel, The Secret of the Sandhills, which was an immediate success. H. G. Wells, an admirer of Gask's work, corresponded with Gask. Wells regarded The Vengeance of Larose (1939) as Gask's "best piece of story-telling...It kept me up till half-past one." Most of his novels described the activities of a detective, Gilbert Larose, in solving crimes. Gask's work was translated into several European languages, serialised in newspapers and broadcast on radio.Table of Contents The Dark Highway Cloud, The Smiter The Vengeance of Larose The Red Paste Murders (Murder in the Night) The Secret of the Garden The Master Spy The Silent Dead The Man Of Death The Storm Breaks The House with the High Wall