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March 28, 2023

Tor/Forge (Macmillan)

480 pages, 5 3/8" x 8 1/4"



Adult Science Fiction

On sale 3/28/23 in trade paperback, ebook, and audiobook.


J.S. Dewes, author of The Last Watch and The Exiled Fleet, returns with another science fiction space opera, Rubicon, that melds elements of Scalzi's Old Man's War with Edge of Tomorrow.

Sergeant Adriene Valero wants to die.

She can't.

After enduring a traumatic resurrection for the ninety-sixth time, Valero is reassigned to a special forces unit and outfitted with a cutting-edge virtual intelligence aid. They could turn the tide in the war against intelligent machines dedicated to the assimilation, or destruction, of humanity.

When her VI suddenly achieves sentience, Valero is drawn into the machinations of an enigmatic major who’s hell-bent on ending the war―by any means necessary.


Tricia Skinner, Fuse Literary

to Press Kit for The Divide series

(The Last Watch & The Exiled Fleet)

TLW and TEF Standing closer.png


“Dewes (the Divide series) continues to demonstrate a gift for superior hard sci-fi with a standalone outing that is simultaneously thoughtful and pulse-pounding. ... Fans of smart military sci-fi will be riveted.”

Publishers Weekly


“This is a classic military science fiction novel that manages to build a fresh and forward-looking story about the costs of “forever” wars and the existential anxiety of artificial intelligence. Witty and readable, it features an endearing cast of characters and fast-paced action and will have broad appeal to fans of sci-fi beyond its MilSF genre.”

Library Journal

“The novel zips along nicely, and as military-flavoured science fiction goes, it’s astonishingly good. I am, alas, astonished by milSF that avoids the pitfalls of misogyny and US-style colonial conservative politics. Rubicon not only clears that bar but leaps above it, with strong prose and striking atmosphere also to its credit. … A hell of a fun ride.”

Locus Magazine

“What is grief if you can’t die? Rubicon seems like a standard space cadets versus monsters story. But while J. S. Dewes spins a fast-paced, popcorn movie tale, be prepared for a twist that will smack the popcorn out of your hand and leave it on the floor with your jaw.”

The New Scientist

“Rubicon and the trauma in it feel terrifyingly real. I couldn't look away.”

Mary Robinette Kowal

Hugo-award winning author of the Lady Astronaut series

“Rubicon blew me away. Concept, characters, story, I loved it all. I can't wait to see where J.S. Dewes takes this world next!”

Nalini Singh

New York Times Bestselling author of the Psy-Changeling and Guild Hunter series

“Rubicon is non-stop military SF action with plenty of twists. I couldn't put it down. J.S. Dewes has entered the military SF arena and firmly planted her flag as one of the best in the business today. ”

Michael Mammay

author of The Misfit Soldier & the Planetside series

"A high-octane blend of fast action, fun characters, and deep questions. In Rubicon, not even death can set you free."

Megan O'Keefe

author of the Protectorate series


Photo by Dave Dewes

Permission granted to use.

Headshot & Social



J.S Dewes is a sci-fi novelist, video game writer, and filmmaker who has written scripts for award-winning feature films and shorts. Find her online @jsdewes.


J.S. Dewes is an author, cinematographer, and video editor who has written scripts for award-winning feature films and shorts. A video game writer by day, she spends her free time drawing, scrolling ArtStation, cuddling her two sweet dogs and mercurial cat, and occasionally sleeping. Find her online @jsdewes.


After graduating with a degree in film production, J.S. Dewes went on to serve as cinematographer for independent films, write, produce, and shoot a zombie musical, slay internet dragons, and act as lighting designer for presidents and presidential-hopefuls so many times it became mundane. To add to her list of random career paths, she unlocked the Dream Job achievement and now writes for triple-A science fiction video games.

Jenny spends her free time drawing, gaming, scrolling ArtStation, cuddling her two sweet dogs and mercurial cat, and occasionally sleeping. Find her online @jsdewes.



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