Introducing K19 Sentinel Cyber, a spinoff series from K19 Shadow Operations, written in Susan Stoker’s Special Forces: Operation Alpha series.
CODE NAME: ADMIRAL (TEAM ONE: BOOK ONE)
He's an FBI agent who always plays by the rules.
She's a hacker seeking revenge.
Neither expected to find love while exposing a conspiracy that reached the highest levels of power.
—ADMIRAL—
When asked to help with the investigation into the murder of a colleague, I know I’ll have to recuse myself as mounting evidence is discovered that suggests my own cousin is the main suspect. Then, I meet Alice Gordon—brilliant, beautiful, and determined to avenge that colleague’s death, who I learn was her sister. As we uncover a web of corruption that reaches from organized crime to the highest levels of government, I find myself falling for the one woman who couldn’t be less “my type.” With enemies closing in and trust in short supply, we'll have to decide if the truth is worth dying for—and if love can bloom in the shadow of betrayal at the hands of those we believed we were closest to.
—ALICE—
My sister's death was no accident. As a hacker who exposes corporate corruption, I know how to uncover secrets—but nothing prepared me for discovering Sarah's connection to the FBI and the dangerous game she was playing. Now, with help from Agent Pershing Kane, aka Admiral, I'm diving deeper into a conspiracy that threatens everything we hold dear. He's everything I never knew I needed—strong, protective, and willing to break the rules to find justice. But with corrupt agents gunning for us and a criminal empire that wants us silenced, our growing feelings could either be our greatest vulnerability or our salvation.
CODE NAME: DANTE (TEAM ONE: BOOK TWO)
He spent years as an undercover agent bringing down his own family.
She was raised to hate everything his name represented.
Together they'll uncover long-buried secrets that connect their families in ways neither expected.
—DANTE—
I dedicated my life to bringing down my brother’s criminal empire, sacrificing everything to expose the corruption that ran through my family name. The last thing I expected was to fall for Lark Gregory—the granddaughter of a woman whose family mine had destroyed generations ago. But from the moment I saw her at that coffee shop, I knew she was different. Now, as threats close in from all sides and long-buried secrets surface, I’ll do whatever it takes to protect her. Even if it means facing my own brother and uncovering truths that could destroy us all.
—LARK—
I was raised on stories of how the Castellanos destroyed my family’s legacy. The last person I should trust is Alessandro Castellano—no matter how much he claims to be different from his criminal family. But as danger circles closer and my grandmother’s closely-guarded secrets begin to unravel, I find myself turning to the one man I was taught to hate. Now, with both our mothers’ disappearances somehow connected and old vendettas threatening to tear us apart, I have to decide if love really can overcome generations of hatred.
Preorder Kindle | Read Chapter One
Releases May 13, 2025
CODE NAME: GRIT (TEAM ONE: BOOK THREE)
His past taught him to never mix duty with desire.
Her lifetime on the run left her yearning for stability.
As danger closes in from all sides, their greatest vulnerability becomes each other.
—GRIT—
I thought I buried my heart alongside the woman I failed to protect. Now, as K19 Sentinel Cyber’s lead field operative, I keep things professional—no exceptions. Until I’m assigned to work with a woman who’s spent her life hiding from organized crime families. When we go undercover as a married couple to infiltrate a dangerous operation, I tell myself it’s just another mission. But there’s nothing pretend about how Lumi makes me feel. Every touch, every glance during training sessions ignites something I thought was dead. As threats mount and secrets surface, I’m torn between duty and the woman who’s crashed through my defenses. I’ve sworn to protect her with my life, but I never expected she might end up saving mine.
—LUMI—
I joined K19 Sentinel Cyber to stop running and start fighting back against the criminals who controlled my existence. What I didn’t expect was Grit—intense, overprotective, and impossible to ignore. He thinks I need to be shielded, but he has no idea what I’m capable of. When our undercover operation reveals shocking connections between my past and our mission, everything I thought I knew unravels. Suddenly, I’m not just hunting dangerous men—I’m discovering truths about myself and the father I never knew. As bullets fly and loyalties shift, Grit becomes my anchor in the storm. But in our world, letting someone in is the greatest risk I've ever taken—and potentially the most rewarding.
Preorder Kindle | Read Chapter One
Releases July 8, 2025
CODE NAME: TANK (TEAM ONE: BOOK FOUR)
His structured approach made him the perfect operative.
Her intuitive intelligence challenged every rule he lived by.
Neither expected their investigation of a cryptocurrency theft
would ignite an attraction that could compromise everything they stood for.
—TANK—
I’ve built my career on structure and strategy, but working with Dragon is testing every ounce of my control. She’s brilliant, intuitive, and challenges my systematic approach at every turn. When a cryptocurrency theft puts us on the trail of quantum technology that could destabilize global markets, we’re forced to work together despite our clashing styles. My job is to lead the mission, not become distracted by her fierce intelligence or the way she sees through my barriers. But as bullets fly and the countdown ticks, those professional lines are starting to blur.
—DRAGON—
Everyone thinks they know who I am—the specialist who keeps her distance, too focused on the mission to form personal connections. They’re wrong. I know exactly what I want, and right now, that’s stopping a catastrophic attack on the financial systems while keeping my “no workplace romance” rule intact. Tank thinks his organized approach is always best, but I’ve spent my career trusting my instincts. As we race through charity events, decipher encrypted drives, and defend each other in firefights to stop a global conspiracy, I’m beginning to realize some rules are meant to be broken. The mission may be protecting encryption codes, but he's threatening to crack the security around my heart.
Read Chapter One
Releases September 9, 2025
CODE NAME: ATTICUS (TEAM ONE: BOOK FIVE)
Releases November 11, 2025
