Boyd wrote several other novels (e.g. "The Shepherd of Admetus", "Bitter Sauces") and at least two plays, but it appears that they were not published - see Terence O'Neill 'Martin Boyd's Missing Novels: a partial solution
, May 1978: 366-8). He was the anonymous author of the broadsheet What Will Happen if I Don't Fight Hitler?
published in 1940 by Shelley Fausset, Essex, England.