Marie Brennan is a former anthropologist and folklorist who shamelessly pillages her academic fields for material. She recently misapplied her professors' hard work to Turning Darkness Into Light, a sequel to the Hugo Award-nominated Victorian adventure series The Memoirs of Lady Trent.

She is the author of the Doppelganger duology of Warrior and Witch, the urban fantasies Lies and Prophecy and Chains and Memory, the Onyx Court historical fantasy series, the Varekai novellas, and nearly sixty short stories, as well as the New Worlds series of worldbuilding guides.