Stargate SG-1 Chronological is a 25-book series with 25 primary works first released in 1999 with contributions by Julie Fortune, Suzanne Wood, Karen Miller, Amy Griswold, Sally Malcolm, Laura Harper, Laura Harper, J. Frances Crane, Peter J. Evans, Sabine C. Bauer, Holly Scott, Jaimie Duncan, Steven Savile, Keith R.A. DeCandido, James Swallow, Tim Waggoner, Diana Dru Botsford, Melissa Scott, Geonn Cannon, Sonny Whitelaw, Jennifer Fallon, and Jo Graham.