Monster Mercenary Mates Series by Robin O'Connor

4.58 · 39 ratings
  • Caught by the Alien Mercenary (Monster Mercenary Mates #1)
    #1

    Caught by the Alien Mercenary (Monster Mercenary Mates #1)

    Robin O'Connor

    Rated: 4.56 of 5 stars
    · Steam rating: 5 of 5
    · 9 ratings · published 2024

    Turns out, the most notorious Mercenary Captain in the quadrant takes offense when he finds a human stowed away in his private quarters.ManyinOnce, I was a renowned archaeologist, then I got abducted. I’m so sick of my life being beyond my control, that when it happens again, I fight back. I escape and hide away on the first ship I can find, hoping to get far away and then plead my case so they can take me back to the human sanctuary... more

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  • Stolen by the Alien Mercenary (Monster Mercenary Mates #2)
    #2

    Stolen by the Alien Mercenary (Monster Mercenary Mates #2)

    Robin O'Connor

    Rated: 4.13 of 5 stars
    · Steam rating: 4 of 5
    · 8 ratings · published 2024

    Kidnapped, locked up, and then stolen by a ruthless, sexy mercenary.HarperKidnapped from my dorm room. Locked in a vault and left to die. And then? Stolen by a ruthless mercenary who claims I’m his mate. What’s a girl supposed to do? Run? Hide? Or surrender to those smoldering looks, the steamy touches, and the sizzling kisses?When a nasty alien crimelord tries to kidnap and sell me for the information he stored on a chip inside my head... more

  • Betrothed to the Alien Mercenary (Monster Mercenary Mates #3)
    #3

    Betrothed to the Alien Mercenary (Monster Mercenary Mates #3)

    Robin O'Connor

    Rated: 4.69 of 5 stars
    · Steam rating: 5 of 5
    · 8 ratings · published 2024

    Trust no one. Hide who I am. Complete the mission. Easy... until I meet him.EvieWhen a dying Xurtal princess makes me promise to save her planet, I have no choice but to take her place. Me, a human girl, pretending to be an alien royal. To survive the assassination attempts, I need a bodyguard. Enter cocky, infuriating, and scorchingly hot.He has to pretend to be my mate to protect me. A fake fiancé for a fake princess... more

  • Entangled by the Alien Mercenary (Monster Mercenary Mates #4)
    #4

    Entangled by the Alien Mercenary (Monster Mercenary Mates #4)

    Robin O'Connor

    Rated: 4.71 of 5 stars
    · Steam rating: 5 of 5
    · 7 ratings · published 2025

    Out from under my brother’s thumb, I want only one survive. Falling for my green protector? Definitely not part of the plan.ElyssaI’ve spent my life under my brother’s iron control. When I finally escape, my goal is deliver the data I stole to the one person I can trust. But fate has other ideas.An explosion leaves me stranded and surrounded by my brother’s vengeful gang... more

  • Saved by the Alien Mercenary (Monster Mercenary Mates #5)
    #5

    Saved by the Alien Mercenary (Monster Mercenary Mates #5)

    Robin O'Connor

    Rated: 4.80 of 5 stars
    · Steam rating: 5 of 5
    · 5 ratings · published 2025

    Alone in the Zeta quadrant, I made one reckless choice. Now I’m pregnant, trapped on a pirate ship, and my only ally is a gruff, brooding cook with a dark past. RubyAs a lone human in the Zeta quadrant, my life revolves around survival. It’s isolating, and in a moment of weakness, I give in to my deepest desire—to have a child. Now, pregnant and more vulnerable than ever, everything is twice as terrifying.When I discover smuggled drugs aboard my ship, I’m furious... more

  • Chased by the Alien Mercenary (Monster Mercenary Mates #6)
    #6

    Chased by the Alien Mercenary (Monster Mercenary Mates #6)

    Robin O'Connor

    Rated: 5.00 of 5 stars
    · Steam rating: 5 of 5
    · 2 ratings · published 2025

    He doesn't speak. He growls. And when he looks at me, I forget Earth ever existed. LyraOne minute I was photographing wildflowers. The next, I woke up in a cage lightyears from Earth—barely clothed, definitely for sale, and completely screwed. Until he tore the doors off my prison.Solear isn’t human. Not really. He doesn’t talk. He stalks. Moves like a predator, fights like a weapon, and watches me like I’m his next obsession... more

  • Tempted by the Alien Mercenary (Monster Mercenary Mates #7)
    #7

    Tempted by the Alien Mercenary (Monster Mercenary Mates #7)

    Robin O'Connor

    Rated: 0.00 of 5 stars
    · 0 ratings · published 2025

    He was built to feed on fear, but I’m the only one who ever tempted him to feel.FrederiqueI woke in a shattered stasis pod, centuries too late, on a world drowning in water and secrets. My mission? Gone. My crew? Dust. And the only being who’s kept me alive since then is an alien mercenary wrapped in living silver and danger. He’s not just terrifying, he’s mesmerizing.I should keep my distance. I know better... more

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