Jack Campbell is a pseudonym for the acclaimed American science fiction author John G. Hemry. Drawing on his rich experience as a retired United States Navy officer, he is renowned for his insightful and gripping military science fiction novels.

Under his real name, John G. Hemry, he has crafted the compelling Stark's War and Paul Sinclair series. As Jack Campbell, he is celebrated for the popular Lost Fleet series, which has captivated audiences worldwide with its four volumes, and more forthcoming editions. His literary repertoire includes over a dozen short stories, many featured in Analog magazine, along with a number of impactful non-fiction works.

Jack Campbell continues to be a leading voice in science fiction, blending his naval wisdom with imaginative storytelling to create unforgettable narratives.