The world of Stargate non-fiction books spans from official "Companion" volumes for each season of SG-1 and Atlantis to scripts, analysis, and much more.
After the 1994 feature film (but before SG-1) Bill McCay wrote a 5-book series that picks up after the events of the original Stargate movie. The alien threat to Earth has only begun!
John Sheppard and his team continue to fight for Atlantis and the people of the Pegasus Galaxy in new adventures, set during the show's 5-year run and also picking up with the city's return to Pegasus after the series' end.
The adventures of SG-1 continue in print, including novels and short stories from Fandemonium and a handful of tie-in novels from Roc. The stories are set at various points throughout SG-1's 10-year history.