Jack Campbell, writing as John G. Hemry, is an American author primarily known for his expansive military science fiction series, The Lost Fleet. Drawing on his background as a retired United States Navy officer, Campbell crafts detailed narratives centered around naval space combat and strategic conflicts. His writing style leans towards expansive world-building, complex characters, and a focus on tactical military operations within a science fiction setting. Beyond The Lost Fleet, Campbell has explored diverse genres, including steampunk/fantasy with The Pillars of Reality series and historical fiction with Stark's War.




































































