Lois H. Gresh is an American author known for her science fiction, fantasy, and non-fiction works, often co-written with Robert Weinberg. She has written numerous novels, short stories, and reference books on topics such as The Matrix, Star Trek, and the history of science fiction and horror. She has also worked in the video game industry as a writer and designer. Her works are characterized by a deep exploration of the themes she addresses and thorough research.