Marie Brennan is the pseudonym of Bryn Neuenschwander, an author of fantasy fiction. Previously, Brennan was an anthropologist and folklorist, and was pursuing her PhD at Indiana University Bloomington before she became a full-time writer. Brennan has published over sixty short stories and eleven books in the Victorian adventure series The Memoirs of Lady Trent, the Onyx Court series, and the Rook & Rose series, as well as two non-series novels. She wrote three non-fiction guides to world-building for writers. She is also a co-author of the books published under the pseudonym M. A. Carrick.