Olga Evgenevna Kryuchkova (Russian: Ольга Евгеньевна Крючкова), pseudonym Olivia Claymore (Russian: Оливия Клеймор) (born 7 August 1966), a Russian historical and mystical writer.To date, the author of 25 novels and published by "Veche" (Russian: "Вече").