The Alien Guardian Chronicles Series by Declan Hirthe

Stranded on a Forbidden World. One human survivor. One protective alien guardian. A bond written in the stars. I thought I’d die alone when my ship crashed on a forbidden planet. The galaxy is cruel, and humans are fragile—but I never expected to be saved by a monster. Kaelum is a Valari—a towering, four-armed alien warrior, built for war and feared across the stars. He should terrify me. Instead, his eyes are filled with something I’ve never seen before… care. The planet wants us dead... moreStranded on a Forbidden World. One human survivor. One protective alien guardian. A bond written in the stars. I thought I’d die alone when my ship crashed on a forbidden planet. The galaxy is cruel, and humans are fragile—but I never expected to be saved by a monster. Kaelum is a Valari—a towering, four-armed alien warrior, built for war and feared across the stars. He should terrify me. Instead, his eyes are filled with something I’ve never seen before… care. The planet wants us dead. Every predator, every storm, every enemy is determined to make sure we don’t survive. But the danger isn’t what keeps me awake at night—it’s the way Kaelum watches over me, claims me, and makes me feel more alive than I’ve ever known. As our bond grows, I realize the greatest challenge isn’t surviving the planet… it’s surviving him. Because in the quiet moments between battles, a human and a monster may discover that love can bloom even in the harshest of worlds. less

I thought I was being sold into a life of labor. I didn’t realize I was being claimed by a Hive. One moment I’m a disgraced medic rotting in a galactic prison. The next, I’m dragged across the burning sands of Oros-IX by three massive, terrifyingly beautiful alien warriors. Zhalok, Khyren, and Vaxen are Khor-Vane—living weapons exiled to a wasteland. Lethal, four-armed, and dying from a psychic sickness only a human “Anchor” can cure. They bought me to save their lives... moreI thought I was being sold into a life of labor. I didn’t realize I was being claimed by a Hive. One moment I’m a disgraced medic rotting in a galactic prison. The next, I’m dragged across the burning sands of Oros-IX by three massive, terrifyingly beautiful alien warriors. Zhalok, Khyren, and Vaxen are Khor-Vane—living weapons exiled to a wasteland. Lethal, four-armed, and dying from a psychic sickness only a human “Anchor” can cure. They bought me to save their lives. But the way they look at me—with a hunger that isn’t just about survival—makes my blood sing. They call me their Pulse-Core. They want to protect me, build a kingdom in the dust, and share me in ways I never imagined. Falling for one alien was a death wish. Falling for three? That’s a revolution. Bound by danger, desire, and destiny, this standalone MMMM sci-fi romance delivers protective “monster” heroes, psychic bonds, and a guaranteed HEA. No cliffhangers, no cheating—just passion, suspense, and interstellar adventure. less

Four hearts. One bond. A destiny that could shatter a galaxy. Ezra Vance was supposed to be a sacrifice. Traded by his own people to the winged warlords of Aethelgard, he expected chains—or death—in an alien fortress. Instead, the three most feared commanders in the quadrant drop to their knees the moment he arrives. Zylos. Kaelum. Vaxen. Powerful. Ruthless. Unbreakable. Until Ezra. The legendary warlords are slowly falling apart... moreFour hearts. One bond. A destiny that could shatter a galaxy. Ezra Vance was supposed to be a sacrifice. Traded by his own people to the winged warlords of Aethelgard, he expected chains—or death—in an alien fortress. Instead, the three most feared commanders in the quadrant drop to their knees the moment he arrives. Zylos. Kaelum. Vaxen. Powerful. Ruthless. Unbreakable. Until Ezra. The legendary warlords are slowly falling apart. Without a Zenith to anchor their power, their bond is collapsing—and their strength could destroy everything they rule. They have searched the stars for centuries. They found him in Ezra. Now he’s trapped between three possessive alien warlords who claim he is their fated mate… and the dangerous heat of a bond strong enough to save them—or burn the galaxy down. Fated to Be Claimed by Three Alien Warlords is a high-heat MMMM gay alien fated mates romance featuring protective alien heroes, intense bonds, and a guaranteed HEA. less

He crashed on a prison moon… and woke up claimed by three alien monsters. Leo Vance should have died when his transport crashed on Aethelgard, a brutal prison world where the galaxy abandons its most dangerous creatures. Instead, he’s rescued by three powerful alien warriors who are just as deadly as the world around them. Xylo-Thane burns with uncontrollable plasma. Kaelen-Zor carries the freezing power of the void. Vorian-Rex hears the universe screaming in his mind... moreHe crashed on a prison moon… and woke up claimed by three alien monsters. Leo Vance should have died when his transport crashed on Aethelgard, a brutal prison world where the galaxy abandons its most dangerous creatures. Instead, he’s rescued by three powerful alien warriors who are just as deadly as the world around them. Xylo-Thane burns with uncontrollable plasma. Kaelen-Zor carries the freezing power of the void. Vorian-Rex hears the universe screaming in his mind. They are unstable, feared, and completely untouchable—until Leo. Because when he touches them, the chaos stops. The fire cools. The madness quiets. Leo isn’t just a survivor. He’s their Anchor—the only one who can stabilize their devastating powers. But when bounty hunters from the Collective arrive to reclaim their escaped prisoners, Leo becomes the most valuable target in the galaxy. And the three alien alphas who claim him will destroy anyone who tries to take him away. Because Leo isn’t just their medic anymore. He’s their mate. Tamed by Three Alien Alphas is a high-heat MMMM gay reverse harem alien sci-fi romance featuring protective alien warriors, hurt/comfort, forced proximity, and a human who becomes the heart of three dangerous monsters. Standalone with an HEA. less

Three Alien Sovereigns. One human. A bond that could destroy or save them all. Kaelen Vance never expected to survive the journey from a dying Earth. When his ship crashes on Valerion, he thinks he’s doomed—but instead, he is claimed by three of the most powerful men in the galaxy. Prince Zylos, Kaelum, and Vax are brilliant, beautiful, and dangerously unstable. Their magic is fading, their empire on the brink, and Kaelen is the only one who can stabilize them... moreThree Alien Sovereigns. One human. A bond that could destroy or save them all. Kaelen Vance never expected to survive the journey from a dying Earth. When his ship crashes on Valerion, he thinks he’s doomed—but instead, he is claimed by three of the most powerful men in the galaxy. Prince Zylos, Kaelum, and Vax are brilliant, beautiful, and dangerously unstable. Their magic is fading, their empire on the brink, and Kaelen is the only one who can stabilize them. But the bond they demand isn’t just physical—it’s total, consuming, and inescapable. Trapped in a gilded palace and caught in a deadly royal coup, Kaelen must choose: can he survive the intensity of three alien mates who would burn the stars to keep him safe, or will the fated connection shatter him before it can save them all? Marked by Three Alien Sovereigns is a standalone MMMM sci-fi romance full of fated mates, possessive alien princes, dangerous passion, and a guaranteed HEA. less

Sold to monsters. Bound to gods. And now… they refuse to let me go. I was a thief trying to survive the outer systems—until the day I was sold to the Void Pits, the most brutal gladiator arena in the galaxy. My purpose? To become the Anchor for the deadliest triad of Zykosian warriors. Kaelen—the fallen general with eyes like frozen stars. Vax—the savage berserker who lives for blood and battle. Jora—the silent psychic who sees every dark secret I hide... moreSold to monsters. Bound to gods. And now… they refuse to let me go. I was a thief trying to survive the outer systems—until the day I was sold to the Void Pits, the most brutal gladiator arena in the galaxy. My purpose? To become the Anchor for the deadliest triad of Zykosian warriors. Kaelen—the fallen general with eyes like frozen stars. Vax—the savage berserker who lives for blood and battle. Jora—the silent psychic who sees every dark secret I hide. Seven feet of wings, muscle, and lethal power. To the arena masters, I’m nothing but a human tool meant to keep their monsters under control. But the Zykosians don’t want a tool. They want a mate. And as the games grow bloodier and our forbidden bond deepens, one terrifying truth becomes. If anyone tries to take their human away…. Three alien gladiators will burn the galaxy to ashes to get him back. A dark standalone MMMM alien romance with possessive warriors, brutal arena battles, and a guaranteed HEA. less

Four broken warriors. One human. A bond that could destroy an empire. I was meant to die on Khash-Vora, a desert world where monsters rule and hope is a lie. But instead, I’m chained to three alien warriors—scarred, powerful, and dangerous in ways I never imagined. Kaelen — a fallen commander who sees me as weakness he can’t afford… but can’t stop protecting. Thrum — a silent mountain of muscle whose fury shields me from every threat... moreFour broken warriors. One human. A bond that could destroy an empire. I was meant to die on Khash-Vora, a desert world where monsters rule and hope is a lie. But instead, I’m chained to three alien warriors—scarred, powerful, and dangerous in ways I never imagined. Kaelen — a fallen commander who sees me as weakness he can’t afford… but can’t stop protecting. Thrum — a silent mountain of muscle whose fury shields me from every threat. Xylo — a broken prince with clipped wings and a darkness that mirrors my own. The Vexian Empire wants us dead. The desert wants us gone. And the device binding our hearts and desires is relentless. Every beat pulls us closer… and every moment of trust could be fatal. Out here, survival isn’t enough. To escape, we must become more than allies. We must become a pack. And as danger closes in, I’m realizing a terrifying truth…. These warriors don’t just want to protect me. They want to claim me. Alien Triad of the Fallen Warriors is a dark, thrilling MMMM Sci-Fi Alien Reverse Harem Romance full of fated bonds, protective warriors, forbidden desire, and a scorching survival fight against impossible odds. No cliffhangers. HEA guaranteed. less

They left me to die. Ten years ago, I was the fifth light in their constellation — part of the Vanguard. We were five hearts, one bond. Until they abandoned me in the Dead Zone. Now I’m back. A ghost stitched together from vengeance and pain. Four alien kings rule Rib-Cage. Vaxen — the commander who betrayed me. Kaelen — the charmer who didn’t look back. Zeryth — the genius who calculated my death. Urizon — the silent monster who let me scream. They think they’ve moved on. They’re wrong... moreThey left me to die. Ten years ago, I was the fifth light in their constellation — part of the Vanguard. We were five hearts, one bond. Until they abandoned me in the Dead Zone. Now I’m back. A ghost stitched together from vengeance and pain. Four alien kings rule Rib-Cage. Vaxen — the commander who betrayed me. Kaelen — the charmer who didn’t look back. Zeryth — the genius who calculated my death. Urizon — the silent monster who let me scream. They think they’ve moved on. They’re wrong. I carry a secret in my blood that could bring their empire to its knees. I came for revenge… but the moment our eyes meet, the bond we shared ignites again. Fierce. Dangerous. Unbreakable. One human. Four alien warriors. One mission that could either destroy them—or us. less