Gannon’s epic fantasy series, The Vortex of Worlds, debuted in 2021 with This Broken World. He collaborates w/ Eric Flint in the NYT/WSJ bestselling Ring of Fire series, has written two solo novels in John Ringo's Black Tide Rising world, and co-authored three volumes with Steve White in the Starfire series. He’s also worked in the Honorverse, Man-Kzin, and War World universes. His other writing credits include lots of short fiction, table-top roleplaying games (Traveller, 2300 AD, Twilight: 2000, Dark Conspiracy) and years of work as a scriptwriter/producer in NYC.

As a Distinguished Professor of English, Gannon received 5 Fulbrights, and his Rumors of War & Infernal Machines won the 2006 ALA Choice Award for Outstanding Book. He is a frequent subject matter expert for national media venues (NPR, Discovery, etc.) and for various intelligence and defense agencies.