Books by O. T. Riesen
Zombie Girl Omega Series
Are we human, or are we the monsters?
Book One: Initiation
Shaped by the same virus that has consumed their world, the Zeta soldiers are as feared and rejected as their enemy. Their existence is solitary, plagued by an unending war with a mindless enemy that feeds on the flesh of those they are sworn to protect. It is a carnal and deadly existence, filled with marauders, zealots, and the mindless, cannibalistic Zee.
Sergeant Omega and her elite team of highly volatile soldiers must rely on each other’s unique abilities to be victorious and to survive. Only by doing so can they hope to reclaim humankind from the threshold of oblivion.
They are the pinnacle of humanity’s achievement and the brink of its failure. How far will they go before death erases the thin line that separates them from the monsters?
Fight until the mission is done. No relief. No surrender. They are the Zeta soldiers, and she is Omega.
Book Two: Contention
The American Southwest has become a raw and treacherous wasteland where survival depends on more than just avoiding the flesh-eating Zee. Sergeant Omega has fought hard to prove that Beta squad deserves the same respect as the elite units, but her disdain for the arrogant Alpha soldiers runs bone-deep, especially when they treat her team like second-class fighters.
When she’s ordered to lead her volatile team on a mission to deliver the legendary warrior Tau home, Omega expects resistance from the wasteland—not from her own charge. Tau’s refusal to respect her command and follow orders doesn’t just undermine her authority—it endangers every life under her protection. As tensions within the squad reach a breaking point, they must navigate not only the hordes of ravenous Zee but also mysterious religious zealots who seem unnaturally interested in the Zeta soldiers.
In a world where trust is a luxury and mistakes are fatal, both rescued and rescuers must overcome their prejudices and learn to fight as one. Because in the wasteland, unity isn’t just about completing the mission—it’s about making it out alive.
Book Three: Insurrection (Coming 2026)
With Tau now serving as her second-in-command, Sergeant Omega finally leads Zeta squad at full strength—but their newfound unity faces its greatest test yet. When the United Forces assigns them an Alpha-level mission to locate a survivor with supposed immunity to the virus, Omega knows the stakes have never been higher. In a world where hope is as dangerous as it is rare, this mysterious survivor could change everything—if they can find her alive.
The wasteland has grown more treacherous than ever. Marauders hunt with increasing desperation, the cannibalistic Zee spawn increasingly terrifying mutations, and a fanatical group called the Shepherds of Light emerges from the shadows with their own mysterious agenda for the infected world. But it’s the constant, gnawing sensation of being stalked by an unseen pursuer that keeps Omega’s nerves razor-sharp and her team on edge.
Their hunt leads them through an impossible discovery—a mobile city of unchanged civilians that may hold the key to finding La Madre, the survivor they seek. Yet even as answers seem within reach, darker questions surface about the United Forces—the very organization Zeta squad has bled and died to serve. Can the masters who shaped them into weapons be trusted with humanity’s future?
As betrayals unfold that threaten to destroy everything Omega and her team have built together, they must confront an enemy that strikes from within. When those you trust become the greatest threat, loyalty itself becomes a weapon.