They’re too old for this fight . . . but they’re the only ones left standing.

When the Colonial Shield Federation needs someone to face an ancient alien threat, they don’t call their best; they call the only two Marines who survived first contact. Problem is, a decade of hard living has taken its toll on Frank Cage and Martin Kelvin. Frank has spent the last ten years drowning his memories in whiskey and starting bar fights, while Martin walks around on a cybernetic leg, tending his garden and trying to forget the past.

But their retirement comes to an abrupt end when a military transport arrives, crushing Martin’s prized tomatoes and bringing orders that can’t be refused. It seems the Hollow have returned . . . Forced back into now-outdated power armor and paired with a squad of combat-tested scientists who think they know the enemy better than the people who fought them do, these two grizzled veterans must face something far worse than death.

Because the Hollow don’t just kill; they collect. In the depths of a long-buried facility, Frank and Martin will quickly find out if they still have what it takes to survive―and what it will truly cost them.

The first book and bonus prequel novella kick off this high-octane military sci-fi saga, marking the explosive start of an exciting collaboration between USA Today–bestselling author J.N. Chaney and New York Times–bestselling author Nicholas Sansbury Smith that’s perfect for fans of Expeditionary Force and Undying Mercenaries.

Get your copy of Old Guns available for pre order now, and set to be released on 3/24.

Old Guns: A Military Sci-Fi AdventureAuthor: Nicholas Sansbury Smith, J.N. Chaney
Title: Old Guns: A Military Sci-Fi Adventure
Published On: 3/24/26
Publisher: Variant Publications
Pages: 515
Narrator: R.C. Bray
Audiobook Length: 14 hours, 24 minutes
Format: Audiobook, eBook, Paperback

Purchase Links:




Also by this author: Extinction Horizon, Extinction Edge, Extinction Age, The Gauntlet

About J.N. Chaney

J. N. Chaney is a USA Today Bestselling author and has a Master's of Fine Arts in Creative Writing. He fancies himself quite the Super Mario Bros. fan. He migrates often, but was last seen in Las Vegas, NV. Any sightings should be reported, as they are rare.

About Nicholas Sansbury Smith

Nicholas Sansbury Smith is the author of several post-apocalyptic books and short stories. He worked for the State of Iowa for nearly 10 years before switching careers to focus on his one true passion—writing. When he isn’t daydreaming about the apocalypse he’s likely racing in triathlons around the Midwest. He lives in Des Moines, Iowa with his family and several rescued animals.

For more info, visit him at:

This book is a fun read. The characters are well done. They are funny and have a lot of character to them. If you like space travel and or military themed books, you’d love this one.