Louise of Stolberg, Countess of Albany. Edinburgh: Oliver & Boyd, 1962.
(ed.) A traveller's guide to literary Europe. London: H. Evelyn, 1965–67.
(ed.) Selected letters by the Marquis de Sade. Translated by W. J. Strachan. London: Owen, 1965.
(ed. and intro.) Ten years exile: or memoirs of that interesting period of the life of the Baroness de Staël by Germaine de Staël. Fontwell: Centaur Press, 1968.
Colette – the difficulty of loving: a biography, London: Owen, 1973.
Women of iron and velvet, and the books they wrote in France, London: Constable, 1976.
Raymond Radiguet: a biographical study with selections from his work, London: Peter Owen, 1976.
(ed. with A. A. Heathcote and M. J. Woods) Spanish studies: literature, 1490–1700.
(ed. with intro.) The leather jacket: stories by Cesare Pavere. Translated by Alma Murch. London: Quartet Books, 1980.
Beyond the lighthouse : English women novelists in the twentieth century, London: Constable, 1981.
Piaf, London: Hodder and Stoughton, 1985.
(ed. with intro.) To the end of the world by Blaise Cendrars, translated by Alan Brown. London: Peter Owen, 1991.
(ed. with intro.) Erotica: drawings by Jean Cocteau.
Simone de Beauvoir: the woman and her work, London: Heinemann, 1992.
Sade's wife : the woman behind the Marquis, London, CHester Springs, Pa.: P. Owen, 1995.
The enigma of Giorgio de Chirico, London: Peter Owen, 1999.
Madame de Pompadour: sex, culture and power, Stroud: Sutton, 2000.
Meeting & parting: new and selected poems 1941–2003, London: Centaur, 2004.
The mysterious mistress: the life and legend of Jane Shore, Stroud: Sutton Publishing, 2006.