Unleashing Mayhem

Demon Bound, Book 4

De: Grae Bryan

Narrado por: Michael Ferraiuolo

Matteo’s been running scared for so long he’s forgotten what it’s like to feel safe. Or maybe he never knew in the first place. Raised by a cruel man, tormented by an even crueler one, and recently rescued by a demon, Matty’s still jumping at shadows around every corner. When he sees a familiar face from the past and realizes his ghosts really have come back to haunt him, Matty does the only reasonable thing he can think of.

He summons someone even worse.

Nightmare is a solitary demon by nature. He’s never needed a companion or a lover or a friend, and he’s never minded being feared by others of his kind. But one taste of Matteo’s sweet, terrified soul and Nightmare needs more. When he’s finally summoned to Matteo’s side, Nightmare finds himself exactly where he wants to be. Now it’s only a matter of patience, seduction, and convincing his little human that one contract isn’t enough.

What they really need is an eternity.

Unleashing Mayhem is a heated MM paranormal romance with a HEA and no cliffhanger. It contains a sweet human afraid of everyone but the monster at his side, a demon so possessive even other demons run scared, a found family made of mobsters and monsters, and a summoning gone right (for once). While each book focuses on a different couple, the series is best enjoyed in order.

©2025 Grae Bryan (P)2025 Grae Bryan

My favorite book in the series!!

Well this is hands down my favorite book in the series. I just adored Matty and his Nightmare. I'd say that this might be the darkest book of the series as well, but there is such a softness and sweetness to Matty as he heals from his past and finds love with the scariest demon of the bunch, that it never gets *too* dark, if that makes sense.

I loved getting to see so many of the previous couples in this one, and everyone working together to help Matty.

Michael, as always, is an excellent narrator. I loved his voice for Nightmare, I don't think I hear this character voice from him very often if ever.

If you're a fan of hurt/comfort, possessive mates, scary demon/sweet and soft human pairing, and overall demonic shenanigans, then you will love this book. I have really enjoyed the whole series and if this is the last one?? (not sure if it is or not) then it really went out on the highest note for me.

His Scary and His Sweet 💚

Since meeting Matty in Wreaking Havoc, I have been so curious about how his story would play out. This story exceeded all my expectations and was my absolute favorite from the series. One of my favorite tropes is when he is only soft for him, and this is Nightmare through and through.

I loved seeing Matty’s personality come through underneath all the fear and trauma he has experienced. Who knew that was all that snark and a little brattiness under all that fear? I loved how Nightmare brought the real him out and also uncovered that Matty is a little bit of a s*x demon, at least he is with his Scary!

Nightmare feeds on fear, feeds on bad dreams, to the point where he has driven some people mad. Nightmare is what people fear, but for Matteo Nightmare has always been his protector inside and outside of his dreams. He even saved Matty from the monsters in his dreams before he summoned Nightmare.

I am such a sucker for nicknames and I absolutely loved Matty and Nightmare’s nicknames for each other; Sweet and Scary. Every Sweet and Scary just made me completely melt and swoon simultaneously.

As always, Michael Ferraiuolo did an amazing job with the narration! I was so curious about what Nightmare’s character would be like and I think he nailed it. He brought to like the duality of sounding both creepy but yet so soft and sweet with Matty. I am so sad for this series to come to an end!

swoon!! 😍

I absolutely love the whole series! I really like that nightmare finds his person! complete family. Great narration!

Demons are Better Than People!

My new motto is Demons are Better than People! Especially in Matty's case. Humans have done him wrong time and time again. It just really made sense when it happened that Matty would bring forth Nightmare! I liked that Nightmare had a very Demon expected personality. But any and all ability to love he had would come out only for his Matty! It was amazing to watch these two balance off of each other. Such a sweet and sensual romance popped out among all the darkness and violence. Need I mention that Michael F. narrated this to perfection! He has such a knack for bringing out quirky characters!

Night!!!

I've been waiting for Nightmare and Matty's story ever since I realized they were going to end up together. I mean, what an odd pairing. Matty is scared of everything, understandably after what he went through in the past, while Nightmare is, well, a Nightmare demon. He haunts dreams and feeds on fear. I could see why he would have an interest in a scared human. It would be like a daily buffet, but I didn't know how Matty was going to feel about it all.

Thankfully I needn't have worried. Matty has layers. He may come off as a timid man, but inside he's hiding a fire that Nightmare has no problem coaxing out. Demons have never hurt Matty like humans have. All they have ever done is protect him, and so he trusts Nightmare to do the same. I don't think Matty expected a mating was going to be the climax of him summoning said demon, but he certainly isn't unhappy it worked out that way.

"𝙷𝚎'𝚍 𝚔𝚗𝚘𝚠𝚗 𝚒𝚝 𝚏𝚛𝚘𝚖 𝚝𝚑𝚎 𝚖𝚘𝚖𝚎𝚗𝚝 𝚑𝚎'𝚍 𝚌𝚊𝚞𝚐𝚑𝚝 𝚝𝚑𝚎 𝚜𝚌𝚎𝚗𝚝 𝚘𝚏 𝙼𝚊𝚝𝚝𝚎𝚘'𝚜 𝚜𝚘𝚞𝚕, 𝚋𝚊𝚌𝚔 𝚒𝚗 𝚝𝚑𝚊𝚝 𝚠𝚛𝚎𝚝𝚌𝚑𝚎𝚍 𝚅𝚘𝚒𝚍. 𝙷𝚎'𝚍 𝚔𝚗𝚘𝚠𝚗 𝙼𝚊𝚝𝚝𝚎𝚘 𝚠𝚊𝚜 𝚍𝚎𝚜𝚝𝚒𝚗𝚎𝚍 𝚝𝚘 𝚋𝚎 𝚑𝚒𝚜.

𝙽𝚒𝚐𝚑𝚝𝚖𝚊𝚛𝚎 𝚑𝚊𝚍 𝚏𝚘𝚞𝚗𝚍 𝚑𝚒𝚜 𝚝𝚎𝚛𝚛𝚒𝚋𝚕𝚎 𝚙𝚞𝚛𝚙𝚘𝚜𝚎, 𝚊𝚗𝚍 𝚒𝚝 𝚠𝚊𝚜 𝚖𝚘𝚛𝚎 𝚋𝚎𝚊𝚞𝚝𝚒𝚏𝚞𝚕 𝚝𝚑𝚊𝚗 𝚊𝚗𝚢𝚝𝚑𝚒𝚗𝚐 𝚎𝚕𝚜𝚎 𝚒𝚗 𝚊𝚕𝚕 𝚝𝚑𝚎 𝚛𝚎𝚊𝚕𝚖𝚜."

I loved seeing how Nightmare was with Matty. It was completely different from how he treated anyone else. He was so protective and caring. He made Matty feel safe for the first time in a long time. It was also funny to see how weary all the other demons were around him, even when Matty was present. Kai even tried protecting Matty at first, which was sweet. Funnily enough, Matty was the one to put Kai in his place when it came to his bond with Nightmare. Matty may have had a problem sticking up for himself in the past, but he had no issue telling anyone off who spoke badly of his demon.

"𝚈𝚘𝚞 𝚊𝚛𝚎 𝚖𝚢 𝚜𝚘𝚞𝚕, 𝙼𝚊𝚝𝚝𝚎𝚘, 𝚊𝚗𝚍 𝚠𝚑𝚊𝚝𝚎𝚟𝚎𝚛 𝚑𝚎𝚊𝚛𝚝 𝙸 𝚑𝚊𝚟𝚎 𝚒𝚜 𝚢𝚘𝚞𝚛𝚜 𝚝𝚘 𝚘𝚠𝚗."

I have loved every book in this series and am bummed it has come to an end. I am looking forward to see where Bryan takes us next with their writing. And though I'll miss these demons and their mates, history has shown me that Bryan will give us another bunch of paranormals to fall in love with soon.

As for the audio, the narrator did a great job in my opinion. I enjoyed the raspy voice he chose for Nightmare. It fit him well. As did Mattys. I could even go so far as to say I enjoyed this even more brought to life!

Amazing

I love audiobooks because they really give life to the characters, and Unleashing Mayhem is a perfect example. Michael Ferraiuolo is one of the best narrators I’ve listened to, and he makes Night and Matty even more loveable.
Unleashing Mayhem is the fourth book of the Demon Bound series. It is a hurt/comfort book featuring the demon Sarkaron, nicknamed Nightmare or Night for his appearance in people’s nightmares, and Matty, a lonely human plagued by the fear of people from his past finding him.
Matty and Nightmare are the perfect match—a man full of fear and nightmares and a demon who feeds on fear and saves him in those nightmares. Nightmare terrifies everyone else (and even has the other demons leery of him), but he comforts Matty because Matty knows what a real monster is thanks to his stepfather and his men. Nightmare becomes Matty’s protector against these monsters.
I love their relationship. It is so sweet and respectful, and Nightmare doesn’t treat Matty like he’s lesser or fragile because of his fears and his abusive past. I wasn’t sure what to expect in a book about a nightmare demon, but this absolutely exceeded my expectations. The sweet connection that Matty forms with Nightmare, the possessiveness that they both feel, and the chemistry that steams between them combine to create a pretty amazing read. We get to see lots of the other couples from the rest of the Demons series as well, which I loved.
I truly loved this book, and I think you will, too.

Fantastic book made even better by audio!

I’ve been excitedly waiting for this book and wow was it worth the wait! Nightmare has been lurking in the shadows of the other books in the Demon Bound series and now it’s time for him to come out of the shadows…sort of. Nightmare and Matty are a delightfully unexpected pairing but for me had the most sincere connection of the group. Matty is all sweetness hidden behind trauma and fear, but somehow accepts and sees Nightmare for who he is, which I think initially takes Nightmare off guard. Nightmare on the other hand is stoic and scary AF, but somehow becomes a cinnamon roll of sorts only for Matty. With Nightmare by his side, will Matty be able to face down his ultimate fear? What made this book even better (didn’t think that was possible) was the wonderful narration by Michael Ferraiuolo, who gave Nightmare such depth and creepiness. This book, without a doubt, needs to go straight to the top of your TBR list!

Unleashing Mayhem

Unleashing Mayhem brings the Demon Bound series to a cathartic, high-stakes crescendo, pitting Matteo’s haunted past against Nightmare’s dark devotion in a fight that feels personal and terrifying. The tension between them crackles—Matteo’s fragility meets Nightmare’s relentless strength in scenes that carry both dread and longing. The pacing is exciting and thrilling, battles, revelations, and emotional reckonings, and an appropriate gravity given to quieter moments, the cumulative payoff is a fierce, satisfying finale!

My favorite of the series

This author does such a great job with unconventional couples, so it’s no surprise that I loved this story. Can’t wait for whatever comes next

Nightmare and Matty

I enjoy this series immensely! Matty and Nightmare are just the best. Michael Ferraiuolo is one of my favorite narrators. He performances are wonderful. He brings emotion to the characters and you can actually tell when different people are talking.