Book excerpt: With Earth threatened by extraterrestrial invasion, it's up to SG-1 to defend the planet. Get the inside scoop on the series and live the adventure. Meet the team from O'Neill, Carter and Jackson to Teal'c and join them on their top secret intergalactic missions as they uncover the mysteries of new planets and encounter never-seen-before races, some friendly, some hostile. Explore Stargate Command level-by-level, then sneak on board the spectacular Prometheus spaceship. Includes an exclusive DVD packed with Stargatematerial - every fan's dream.