Lloyd Rose is an American writer most associated with her work on various Doctor Who spin-offs. She has also written for the American television series Homicide: Life on the Street and Kingpin. She often jokes in her biographies that her name is the pen name of a writer called Sarah Tonyn (a pun on serotonin), although (despite the information on her IMDb entry) she has not had any professional writing published under this name.
Rose wrote the season seven story Zen and the Art of Murder for the series Homicide: Life on the Street in 1993 and was one of the writers for the 2003 mini-series Kingpin. After becoming a fan of the Virgin New Adventures, Lloyd sent a proposal for an Eighth Doctor Adventure to BBC Books which eventually became the story The City of the Dead (BBC Books, 2001). This novel was highly regarded by both the readership and her contemporaries, and led to two further novels — Camera Obscura (BBC Books, 2002; winner of the 2002 Doctor Who Magazine Award) and The Algebra of Ice (BBC Books, 2004) — being published, the latter as part of the BBC's Past Doctor Adventures range.