Matthew John Costello, born in 1948, is a prolific American author whose storytelling prowess spans horror, gothic, and science fiction genres. His career includes articles in the Los Angeles Times and Sports Illustrated, and significant contributions to interactive entertainment. He is best known for scripting the groundbreaking CD-ROM interactive dramas The 7th Guest and its sequel, The 11th Hour, alongside myriad other video games that have captivated audiences worldwide.

Beyond his contributions to adult literature and gaming, Costello has ventured into children's literature and educational games, creating engaging content that both entertains and educates. His works include the book series The Kids of Einstein Elementary and Magic Everywhere, as well as educational games such as Aladdin's Mathquest and A Cartoon History of the Universe. Costello's versatility and creativity have earned him nominations for prestigious awards such as the Bram Stoker and Prometheus Awards and have solidified his position as a multifaceted writer whose impact spans various mediums and genres.

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