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Fantasy illustration: Nightmare holds a lamp for a woman reading his book
JUST ONE MORE CHAPTER.
He’ll keep the light on.
Watch the foil catch the light & the book open
The eyeball edges ↗

Fantasy meets your bookshelf. Detail photographs show the actual edition; the individual offer includes one paperback.

Guarded by the Nightmare (Foil & Sprayed-Edge Special Edition)

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Always signed by the author.
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Monster Security Agency: Guarded by the Nightmare — Peekaboo Edition

No one survives hiring me. Not even her.

I'm a Nightmare, a creature that feeds on fear, and I'm capable of boundless cruelty — which is why my services come at a steep price: the life of the person who hired me. As such, the only people who hire me on are those brought to me by fate, like Mina, a woman so desperate for revenge that she's willing to spend her own life to get it.

I don't usually care why I'm hired. Human affairs don't matter to me. Food is food, and a job is a job.

Mina's enemies will get what they deserve — and I'll get what's mine.

Her beating heart.

Monster Security Agency is the most elite bodyguard service in the world. These monster bodyguards are lethal, powerful, and determined to protect their clients at all costs. They shouldn't fall in love with their principals, but if they do? Things are bound to explode.

Perfect for readers who want: spooky romance, nonhuman heroes, emotional safety under danger, and creature-specific obsession.


More MSA: Spider · Kraken · Krampus · Get the MSA Bundle


Why I wrote Guarded by the Nightmare

Synopsis

No one survives hiring me. Not even her.

I’m a Nightmare, a creature that feeds on fear, and I’m capable of boundless cruelty—which is why my services come at a steep price: the life of the person who hired me. As such, the only people who hire me on are those brought to me by fate, like Mina, a woman so desperate for revenge that she’s willing to spend her own life to get it.

I don’t usually care why I’m hired. Human affairs don’t matter to me. Food is food, and a job is a job.

Mina’s enemies will get what they deserve—and I’ll get what’s mine.

Her beating heart.

Monster Security Agency is the most elite bodyguard service in the world. These monster bodyguards are lethal, powerful, and determined to protect their clients at all costs. They shouldn't fall in love with their principals, but if they do? Things are bound to explode.

Sneak Peek: Chapter 1

“It’s time.” 

I erupted out of the ground in Royce’s office and planted my hourglass on his desk with bone-rattling force, so that both of us could watch the last of the red sand inside pour down. 

His jaw clenched. He hated me, and with good reason. I’d killed his great-grandfather when I’d been bound to his line, and no matter how often he tried to rid himself of me, just like his father and his grandfather before him, he hadn’t managed it yet, and he never would. 

I was a creature of shadow and fate, and every time the hourglass turned, it was time for me to get my due—and right now, there was someone coming to the Monster Security Agency who was meant for me.

Someone from whom I could feed.

Royce pushed himself away from his desk reluctantly. He’d said ‘no’ before, and he’d tried to refuse me, but that wasn’t how this worked. The curse that made me roam the earth feeding on fear and terror could not be denied, just delayed, for one hourglass’s worth of sand.

“Fuck you, Sylas.”

I laughed at his discomfiture. “Cursing won’t change anything. Does it even make you feel better, at this point?” 

“Not really, no,” he confessed, taking a long inhale, and looking out the window beside him, as if he could see whoever was arriving, seventeen floors below. 

“Who do you think it will be?” I asked conversationally. The opportunity to taunt him was too good to pass up. “Young, or old? Male, or female?” The smoke I was comprised of swirled around in eager anticipation. 

A sheen of sweat broke out on his head, reflecting light as he shook it. “Whoever it is, I don’t want to meet them.” 

The burden of knowing that horrible things were going to happen was too great for him to bear, but it didn’t bother me in the least. In almost every case people—usually men—would walk in and ask to hire a monster for an ‘assignment’. Sometimes they were cagey, sometimes not, and I would give Royce one thing, he never entertained them, nor tried to extort money from their insanity. The second they said anything about hurting other people, he—or a cadre of his employees—would escort them out the door.

And in those cases, released from my tether to his hourglass, I would follow them, silently, knowing that a great crime was going to be committed. I had followed cult leaders, mad bombers, and school shooters alike—and each time, I knew that somewhere inside the MSA building a frantic Royce Bannerman was making phone calls to lines that would suddenly not work, or getting through and shouting warnings that went unheeded.

His line was cursed, I supposed, much the same as I was—but I had accepted my fate long ago. I was well aware of my place in the world, and I didn’t fight it.  

“I have no idea what my grandfather was thinking, when he tied you to that.” Royce pointed at the hourglass that we were both watching—the object I’d spent most of the past three generations trapped inside.   

“Hmm. He was probably too busy planning your great-grandfather’s funeral to think much,” I said, letting a malevolent smile cross my shadowed face. 

Royce made a pained, growling noise, from deep inside his chest. “You’re no better than a tick.” 

I gave a dark and mocking laugh. “Really, Royce,” I chided. “Have you ever considered that I perform a needed function?”

The magical dark red sand inside the hourglass was thinner now and pouring out like blood. 

“Which would be?” he asked, his tone arch. 

“Maybe someone needs to feed on those emotions. Maybe if they were left alone, they would multiply endlessly, splashing out onto others.” 

“Is that what you tell yourself? So you can sleep at night?”

“Oh, tsk, Royce. I don’t sleep. I only make others sleep—sleep, and dream of me.” The final few grains were rattling down. “Here it comes.” 

The last one dropped—and Royce’s intercom went live. “Mr. Bannerman? There’s a potential client here to see you. I tried to tell them you weren’t in, but—” 

I eyed Royce, watching him swallow and hate me with his full heart.

It was the first time I’d gotten to eat since being released, and his animosity tasted like a fresh warm blackberry plucked from the vine at the end of the season, when you were standing in full sun, but there was a light and comforting breeze all around you. 

It tasted like life. 

I wanted more—so much more—and soon I would have it. 

Royce gritted his teeth together and reached out to hit the intercom button. “Reception room three,” he announced. 

“Race you there,” I taunted him, snatching up my hourglass to sink into the floor at once.

Dark monster romance · Cassie Alexander

She didn’t hire him to save her.

She hired him because she wanted her enemies to pay. Even if she had to pay, too.

Mina knows what hiring a Nightmare will cost her.

Let him take her enemies first. Then he can have her heart.

She’ll choose the targets. She’ll help set the traps. She might even make him laugh—assuming a creature of living shadow appreciates a joke about his mother being a fog machine.

It’s easier to call him her murder buddy than think about what comes after revenge.

Until she starts wanting him. And the heart she promised him gets involved.

A LITTLE NIGHTMARE, IN CASSIE’S OWN VOICE

Let me read you a little darkness.

You’ve met the monster. Now step inside the story.

Cassie Alexander reads from Guarded by the Nightmare, with the special edition in her hands.

A 1 minute 40 second author reading

Keep reading: choose your edition ↑
Read by the author. The full audiobook is narrated by Jonathan Lake and Avery Caris.

THE DANGER IS REAL. SO ARE THE FEELINGS.

“No one survives hiring me.
Not even her.”

Meet your Nightmare ↓
The story

A HEART IS A DANGEROUS THING TO PROMISE.

His price?
Her beating heart.

I’m a Nightmare, a creature that feeds on fear, and I’m capable of boundless cruelty—which is why my services come at a steep price: the life of the person who hired me.

As such, the only people who hire me on are those brought to me by fate, like Mina, a woman so desperate for revenge that she’s willing to spend her own life to get it.

I don’t usually care why I’m hired. Human affairs don’t matter to me. Food is food, and a job is a job.

Mina’s enemies will get what they deserve—and I’ll get what’s mine.

Her beating heart.

What’s included

SOMETHING WORTH KEEPING

Your edition.
Your kind of darkness.

Foil & Sprayed-Edge Special Edition

  • One physical paperback
  • Foil cover
  • Eye-pattern sprayed edges
  • Accent illustrations

Audiobook sold separately.

Back to your edition ↑
About the series

MONSTER SECURITY AGENCY

Protection comes with complications.

Monster Security Agency is the most elite bodyguard service in the world. These monster bodyguards are lethal, powerful, and determined to protect their clients at all costs.

They shouldn’t fall in love with their principals, but if they do? Things are bound to explode.

Step into the Agency →

BEFORE YOU LET HIM IN

The book. The editions.
Your questions, answered.

What is Guarded by the Nightmare about?
Guarded by the Nightmare by Cassie Alexander is a dark monster romance in the Monster Security Agency world. Mina hires a creature who feeds on fear to take revenge on her enemies. His payment is her life: the beating heart he intends to claim.
What kind of romance is it?
This is a steamy paranormal monster romance with a human heroine and a nonhuman Nightmare. Revenge, a dangerous protector, and the pull between fear and intimacy drive the story.
What makes the paperback a special edition?
The Foil & Sprayed-Edge Special Edition has a foil cover, eye-pattern sprayed page edges, and accent illustrations. The individual paperback is $39.99 USD. View the paperback. The audiobook is a separate purchase.
Who narrates the audiobook, and how is it delivered?
Jonathan Lake and Avery Caris narrate Guarded by the Nightmare. The digital audiobook is delivered through BookFunnel after purchase. It does not include a physical book or device. View the audiobook — $14.99 USD.
What comes in the signed MSA collection?
The collection includes Guarded by the Spider, Guarded by the Kraken, Guarded by the Nightmare, and Guarded by the Krampus. All four books are personally signed by Cassie, with swag included. Nightmare and Kraken have foil covers, sprayed edges, and accent illustrations. Krampus is included free. Guarded by the AI is not included. See the collection — $109.99 USD.
Choose your Nightmare edition ↑

TAKING HIM HOME

Delivery &
a real person to help.

Paperbacks

Orders usually process within 5–7 working days. Shipping time is additional and depends on your destination. Cassie inspects and signs paperbacks before sending them from her office.

Read the shipping policy.

Audiobooks

BookFunnel sends your digital delivery email to your checkout email address. Look in Spam or Promotions if you don’t see it. No physical book or device is included.

Need help with an order?

Contact cassie@cassiealexander.com. If a book arrives damaged or the wrong item arrives, contact us promptly so we can evaluate the issue.

Fantasy scene: Nightmare holds the lamplight for a woman reading his book in bed

JUST ONE MORE CHAPTER.

He’ll keep
the light on.

Choose your edition ↑
Styling concept for the four-book signed MSA bundle

THERE’S ROOM FOR MORE THAN ONE MONSTER.

Bring the
collection home.

Spider. Kraken. Nightmare. Krampus. Four signed paperbacks, with special editions of Nightmare and Kraken.

$109.99 USD

Choose the signed collection →

FOLLOW YOUR NEXT OBSESSION

There’s more after dark.

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