A Rare Benedictine: The Advent of Brother Cadfael is a collection of three short stories by Ellis Peters, featuring her medieval detective, Brother Cadfael, first published in 1988.

Edith Mary Pargeter, also known by her pen name Ellis Peters, was an English author of works in many categories, especially history and historical fiction, and was also honoured for her translations of Czech classics. She is probably best known for her murder mysteries, both historical and modern, and especially for her medieval detective series The Cadfael Chronicles.