Peter Berresford Ellis (born 10 March 1943) is a British historian, literary biographer, and novelist who has published over 98 books to date either under his own name or his pseudonyms Peter Tremayne and Peter MacAlan. He has also published 100 short stories. Under Peter Tremayne, he is the author of the international bestselling Sister Fidelma historical mystery series. His work has appeared in 25 languages.
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