Toronto-born author and journalist Stephen O'Shea moved to France in the early 1980s. There, he took up journalism, shortly after completing postgraduate degrees in politics at the Université de Paris 1 (Pantheon-Sorbonne) and the prestigious Institut d'Etudes Politiques de Paris. In 1989, Elle magazine relocated O'Shea to New York to be a senior features editor of their American edition. In 1993, he returned to Paris, where he worked as Variety's film critic, and published articles on French culture and politics for American, British, French, and Canadian magazines, including The Observer, The Times of London, Harper's Bazaar, Interview, Allure, and Mother Jones. To research The Perfect Heresy, O'Shea moved to Perpignan in southern France in 1997, where he spent two years immersing himself in Cathar lore. In addition to The Perfect Heresy, O'Shea is also the author of the widely acclaimed Back to the Front (Walker & Company, 1997), a hiker's meditation on the trenches of World War I. Stephen O'Shea currently lives with his wife, Jill Pearlman, and two daughters in Providence, Rhode Island.