Peter Berresford-Ellis

Peter Berresford Ellis, an acknowledged expert on the Celtic world, is an historian, literary biographer and novelist. He is author of the bestselling Sister Fidelma historical mysteries (writing as Peter Tremayne). Seumas Mac a' Ghobainn was a Scottish author, essayist and propagandist who died in 1987. He was co-author (with Peter Berresford Ellis) of The Problem of Language Revival (1971).