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Ain't no bigger line to cross than layin' eyes on your best friend’s sister. But hell, rules—they’re there to be broken, right?

One call from my club brother askin’ me to help his kid sister and I’m there in a flash. Harper ain’t no kid anymore, but now, she’s all I can think about. That sweet body, those innocent eyes—they’re tearing down every wall I put up.

She overheard somethin’ she shouldn’t have, and now she’s in danger. Well, they don’t know who they’re messin' with. I’d die before I let ‘em lay a hand on her.

If I can get us both out of this alive, she’ll be in my bed, right where she belongs.

Some lines weren’t meant to be crossed—but I’m about to erase 'em.

She’s mine, and I don’t play by anyone’s rules.

"Gio" is the 6th installment in the gripping "Steel Demons MC" series. Get ready for rugged bikers, forbidden desires, and irresistible allure.
While each book in the series offers a standalone happily ever after for the couple, it's recommended to read them in order for maximum enjoyment."

216 pages, Kindle Edition

Published November 25, 2024

538 people are currently reading
83 people want to read

About the author

Sarina Hart

59 books85 followers

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5 stars
555 (62%)
4 stars
217 (24%)
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95 (10%)
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14 (1%)
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4 (<1%)
Displaying 1 - 30 of 45 reviews
Profile Image for Doris.
3,631 reviews138 followers
November 24, 2024
Loved It!!

This is pretty much the rule in any MC…you don’t touch a brother’s sister. Well, Gio did a little more than touch Sniper’s sister Harper. She always had a crush on Gio and now years later they meet up again when her brother has Gio keep his sister safe in his absence especially after she heard something she shouldn’t have. These two were on fire.

There was plenty of MC action with a rival who has set their sites on Harper. Would Gio be able to keep her safe when they attempted numerous times to grab her and what would her brother think of things when he finally returned back to the clubhouse? This book was a huge page turner for me. I can’t wait for more MC stories to come from this author.
Profile Image for Shiro Kitana.
453 reviews8 followers
December 3, 2024
Harper is so annoying and stupid as fuck. Because tell me why, when men who are in illegal dealings that are willing to trash your house and threaten you are doing all that, you with your idiotic self want to put your life at risk for a job. THEN you leave the safety of Gio's house to go back to the place where you know these people hang around and THEN act all shocked when Viper was there....dotish little girl. And the fact Gio just brushed it off like I'm not mad at you. You should be cause if she got killed it's on your head. Then the whole part where Cole was so disrespectful to Gio. I mean I understand he slept with your sister but not just one but thrice, he made it seem like Gio was scum of the earth. If I was Gio, I would not be his friend after that.

Also Gio is supposed to be the most violent/savage in the MC and only Hollywood matches his crazy? 🤣 Ummm this man is so tame and mild, the only time he seemed badass was when he rescued her and when she gets kidnapped. Otherwise, he is more on the milder side compared to other books
424 reviews3 followers
November 19, 2024
Another swoon-worthy addition to the series!

What a journey! I really loved this book! Great writing, intriguing and engaging plot and a swoon-worthy MMC (Gio) that had me drooling! Not that the FMC (Harper) was any less awesome!

So…where to start…Gio is Rocky’s younger brother and best friend – practically a brother – to Harper’s older brother Cole (aka Sniper). Both in Steel Demons MC, with Gio being recently promoted to Road Captain. Harper was Cole’s annoying little sister growing up and, after their parents’ death, he is her only family. She had always had a crush on Gio, but Cole made Gio promise that she would be off limits. So, she had initially chosen to leave Steel City – and Vegas – and move to another state to build her life. She is now an awesome event planner – and a stubborn, bold, amazing woman. When work brings her back to Vegas, she accidentally witnesses a conversation that she shouldn’t, getting one of the parties involved – Viper, a Blood Reaper – suspicious and threatening. When the Reapers try to threaten her directly, she has no choice but to turn to her brother, who, being out of town, sends Gio to her. He decides to become her fake boyfriend, but lust and old feelings ignite a scorching flame that consumes them both and the “fake” factor doesn’t feel like it anymore. Something that starts as temporary turns into so much more – although I think that deep down both of them feel the “more” factor from the get go... Gio can’t resist her – and he doesn’t want to. He swears to protect her at all cost – not only because of who she is to Cole, but even more because of who she becomes to him. A rollercoaster of events occur that left me biting my nails. Gio is a dream man – seriously. And the hotness of their encounters left my head spinning and my blood sky-rocketing. Phewwww. How will Cole react? How will the Steel Demons deal with the Blood Reapers and protect Harper? How far is Gio willing to go for her? I couldn’t put the book down till the very last page and finished it in one sitting. Unquestionably a 5-star read in my opinion.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Toni.
2,368 reviews24 followers
November 24, 2024
Harper is in Vegas for a charity event that she is staging as an event planner. As she looking around to make sure she's got the casino and environs memorized she hears Carl who's the rep she's working with and someone else talking about guns. She has to act like she didn't hear anything but is threatened anyway. About a day later someone breaks into her place she's rented. She calls her brother Cole who calls Gio.
Gio, is pledged into the Steel Demons as Road Captain. He feels like it's been a long time coming. He's celebrating when he gets a call from Cole that his sister needs help. He heads out and finds her and tells her he's taking her to the clubhouse. She won't back down about doing the gala so he goes as her boyfriend. On the way back to the clubhouse they are chased by the opposing MC who have decided to frighten her to make sure she won't talk. He takes her to his home.
Harper, Gio, Cole and Gio's older brother grew up together. Gio's family took Harper and her brother in when their father died. He knows her well. He knows she can be stubborn and sassy. His thinking of her has changed a lot over the years. Now he wants something more. He just has to keep her alive from the other MC and himself alive from her brother's wraith.
Will he succeed? Will he actually come to terms with his need for her? Will Harper be able to confess how she feels about him?
Danger and love blend into one turbulent adventure that will rock both their worlds and maybe unite them.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
165 reviews1 follower
November 23, 2024
I usually enjoy my MC novels as much as my shifters. After reading Maverick, Slate and Hawk's stories I had great thoughts for Gio and Harper and was slightly disappointed. I just don't understand why when Harper's life was threatened the first 2 times she just didn't go back to California. Seriously even in the world of MC romance, no job is worth the nonsense of putting on a great party. Harper then extended her stay when she was in danger that then started to involve the club. I mean even if she didn't want to leave Gio she did not have to keep going back and forth to the same hotel she was threatened at. The Cindy situation was truly a waste of time because Gio should have banned her for even approaching Harper in the first place. It was an ok read but I was definitely not into Harper's decision making.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
1,605 reviews12 followers
November 29, 2024
Gio is the sixth installment in the Steel Demons MC series. This book is the amazing tale of Gio and Harper who are beautifully written and executed throughout the book. I thought this book to be quite suspenseful and most definitely a page-turning MC romance book. The relationship between Gio and Harper was forbidden because Harper was Gio’s best friend’s sister. I absolutely adore getting to know both Gio and Harper as well as witnessing their forbidden love coming to fruition. I do love that Gio and Harper have a happily ever after with them becoming engaged to be married. Author Sarina Hart continues to create marvelous MC romance books that I absolutely enjoy reading and I’m looking forward to read more amazing books. Gio is definitely an MC romance book that I would give as a recommendation for anyone to read.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Tiffany  Hill.
708 reviews15 followers
November 23, 2024
Another great love story!

This is book 6 in the Steel Demons MC series. Another great love story in this series.

Gio is Harper brother's best friend and they have known each other since they were kids and she has had a crush on him since she was teenager. As soon as she got old enough she moved away and never looked back. However, when she came home for work she overheard something she shouldn’t have. Who does she call for help?

Gio who has promised to not touch his best friend's little sister and has had a secret crush on. As soon as Harper calls him for help all his protective instincts kick in and as soon as Harper asks for more from him. He has no problem falling in love with his best friend’s little sister.

Very well written drama that you want, fast pace, easy to get lost in and can read in one sitting. I'm so looking forward to the next book in the series.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Grinning Cat.
3,721 reviews121 followers
November 28, 2024
Cat’s Stats
MMC/FMC- Gio and Harper
Length- novel
Heat- They do the things and name the parts using words that start with the letter C.
Series? Y
Triggers- OW drama, graphic violence, explicit erotic content, language
Tropes- Brother’s Best Friend, Protector, Secret Crush, Off Limits, Reformed Man Ho-Ho-Ho, Instalove, Baby You Can Drive My Cartel, We’re Bad but They’re Worse, The Better to Hear with, Wrong Place and Wrong Time, Easy Rider, Five Pounds of Crazy in a Three Pound Bag.
Mewsings
I liked this one. It had a good amount of action, a good amount of sex/romance, and a soupçon of crazy. Like when Gio went rogue. I liked Harper, and Gio was f-i-n-e, if a man Ho-ho-Ho. The ol’ ladies were good friends to each other. And there was a HEA. Who could ask for more?.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Andra Shaw.
1,311 reviews11 followers
November 30, 2024
Gio is the sixth book in the Steel Demons MC series. Just like the previous five books, the the man from the MC becomes the rescuer and protector of a damsel in distress. In this book, Gio becomes protector of his best friend Cole's little sister, Harper. She has always had a crush on Gio and has always been forbidden fruit. Let's just say promises are broken and a life long friendship is tested to the limit. In between all of that, Gio has to keep Harper safe from a rival MC and is ready to go scorched earth to make sure no harm comes to her.

With action, lots of hot steamy romance, twists, a costly betrayal, loads of drama, suspense, engaging characters, and more Gio is a book you will not want to put down.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
5,017 reviews27 followers
November 28, 2024
Harper has not been back home in years, she is back in town for a job. The first day she overhears something that puts her life in danger. Her brother Cole/Sniper is out of town and asks his best friend Gio to keep her safe. Harper has always had a thing for Gio but he never looked at her the same.

Gio made promise years ago to never touch his sister but he never expected her to grow up so nice. When her job is finished and leaving the next day, they give into temptation and sleep together, it was more than either expected. When she ends up not leaving, the pair continue.

Looking forward to the next in the Steel Demons MC, the author never disappoints.

I received a free copy of this book and am voluntarily leaving a review.
Profile Image for Coastie  Mom.
1,450 reviews8 followers
December 7, 2024
Gio is the new road captain of the Steel Demons. Harper is the younger sister of Cole (Sniper) and finds herself in some trouble. Gio to the rescue! Harper has always had a crush on Gio and with Gio protecting her while Cole is gone, feelings start to form, and one thing leads to another. Gio always made a promise to Cole not to touch Harper. Gio is a 3 night per woman kind, but with Harper, there is more and he doesn’t give Cindy (a club bunny) the time of day. When Harper is kidnapped and they find out someone in the club snitched to the rival MC, things spiral fast. Will Cole forgive Gio for touching his sister and will Gio forgive himself for not protecting Harper?

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
2,867 reviews3 followers
November 25, 2024
Harper (who is Sniper’s lil sister) and Gio’s story has them coming together after she overhears a conversation Viper, Blood Reapers MC, has. He tried to threaten and grab her so her bro sends his bf/MC bro, Gio since he’s out of town. Now she’s all grown up and he has to be her fake boyfriend. But when it starts to feel like more will it be ok with Sniper, or will the pack they made years ago still be enforced. The story has drama, suspense, violence and steamy romance to keep you reading to see how it ends for them all.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
1,796 reviews2 followers
December 30, 2024
Great!

I chose this rating because this was a pretty great book. I enjoyed pretty much all of the characters, although there were a few that I didn't care for. This was a book about determination, compassion, kindness, acceptance, doing what you love, and also falling in love. I enjoyed Gio and Harper's story. The author did an amazing job putting these characters together. I enjoyed the way they came back together from children to adults. They realized how much they had matured and developed a real relationship. Great read! I recommend this book to all romance readers and MC lovers.
Profile Image for Danee.
4,917 reviews
November 27, 2024
A great MC story, we follow Harper and Gio. Gio is sent to Harper by her brother when she is in danger because she heard something she shouldn't have heard and that she was there at the wrong time. They have an attraction to each other and Gio does everything he can to protect her, but whether he can also keep his hands to himself is the second question. A steaming story with enough tension, danger, action, romance and an age difference.




I received an Advance Reader copy of this book and am voluntarily leaving a review..
Profile Image for Wendy Livingstone.
20.1k reviews257 followers
September 19, 2025
Great story!!

This is the sixth book in this phenomenal series and this is Gio and Harper's story.
This is a well written action packed, easy to read story, with family, friendships, emotions, danger, suspense, intrigue, challenges, loyalty, betrayal, taking chances, revelations, I undeniable chemistry, and love which leads to an entertaining, twisted, and unpredictable addictive page turner.
I look forward to reading more from this talented author whose work I highly recommend.
8,815 reviews63 followers
November 17, 2024
When Harpers life's indanger from overhearing something she shouldn't habe her brother sends Gio to protect her, he's instantly drawn to Harper and will do anything to keep her safe from what's to come but will they cross that forbidden line? Well written steamy desires, age gap, brothers best friend, off limits and more.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Merry Jelks-Emmanuel.
13.3k reviews155 followers
November 21, 2024
When Harper overhears a conversation between two men in the hotel, she is planning an event for chaos ensues and she runs to her brother for help. Gio steps in for her brother and their t begins in this action-packed story filled with dangerous twists and turns along with shady characters that are deadly and will do anything to keep Harper quiet.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Debbie Benson.
9,688 reviews35 followers
November 22, 2024
I received a free copy of this book via Booksprout and am voluntarily leaving a review. It is an action filled story that starts with a call for help from Harper. Gio is sent and he takes the job very seriously especially after he falls for her. Harper is strong and helps with her own protection. However a betrayal by one of their own ups the anty until Gio rescues Harper. The problem is solved and Harper and Gio are a couple.
3,221 reviews4 followers
January 7, 2025
Harper hears something she shouldn't, and now they're after her. Gio rescues his best friend's little sister. Problem... she's not so little anymore, but she's still off-limits. They fall hard and fast, and how he has to keep her safe and himself out of hot water with her brother. This is an interesting MC, with all the good that these guys do out in the community, and their women are welcoming to Harper. I received a free copy of this book via Booksprout and am voluntarily leaving a review.
306 reviews2 followers
November 16, 2024
Loved this one.
Gio and Harper reconnected and
started falling for each other.
Harper is a party planner, overheard a deal going down and was in danger.
Gio was asked to keep her safe by her brother...😵‍💫he did more then keep her safe.
😉 totally hot!


Total HEA
⭐️⭐️⭐️⭐️⭐️
❤️❤️❤️❤️❤️
🌶️🌶️🌶️🌶️🌶️
112 reviews2 followers
November 30, 2024
So far I’ve read the whole series and they are all great. You won’t go wrong with reading any of them. You don’t have to read them in order but if you want to really know the crew you should. You get everything humor, action, love, sex. You won’t regret it.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
763 reviews3 followers
December 6, 2024
Harper definitely wasn't a favourite of all the females so far, yes she is Coles sister but given she has distanced herself from him and his choices I thought she was alittle stuck up and given she caught herself in a bad situation she kept putting herself in harms way again and again.
Gio was sweet and also fierce when he had to be to protect Harper.
Glad they had a happy ending.
Profile Image for Jetscarbie.
683 reviews15 followers
January 16, 2025
Gio was a big old mush. I never got the feeling he was some hardcore biker outlaw.

I liked that Harper was okay with their relationship right from the start. There was no big push and pull between them. But Harper was annoying. That woman kept walking right into danger without a care in the world.
1,379 reviews3 followers
April 18, 2025
Steel Demons MC book 6- Gio & Harper

Harper was working at a Hotel in Vegas and she over heard a conversation that puts her life danger. Harpers brother Cole asked his best friend to watch over and protect Harper. Gio grew up with Harper
and Cole, he was very happy to watch over Harper. Great series.
Profile Image for Tami.
488 reviews1 follower
November 18, 2024
Awesome story. Absolutely love how the MC are like brothers. And Gio promised he would never put moves on Harper. But she put the moves on Gio!!!.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Darcy.
1,698 reviews9 followers
November 21, 2024
Book 6 is another fantastic read in the Steel Demon series with men, who fall hard, and the strong woman able to handle them. I loved how Harper knew what she wanted with Geo and her career and went after it. The author wrote an amazing story without going over the top with unnecessary drama.
Profile Image for Amanda.
1,320 reviews8 followers
November 24, 2024
Really enjoyed forbidden romance with your best friend's sister. Enjoyed the chemistry between Gio and Harper. Another good story.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
2,280 reviews
December 6, 2024
Gio is asked by his best friend Cole to watch out for his sister Harper when she finds herself in trouble. A great steamy bikers romance with a few types of trouble.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Debbie Bolay.
892 reviews2 followers
December 7, 2024
💕💖💕 Gio and Harper 💕💖💕 Harper overheard something she shouldn't have and Gio was sent to help her. This series and book are awesome. A must read author!.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.
Profile Image for Andrea Gillan.
2,849 reviews3 followers
December 7, 2024
Good read

This was a good read in the series. Gio is tasked with looking after Snipers little sister who is not so little anymore. The three of them grew up together and there was always an attraction between the pair.
Displaying 1 - 30 of 45 reviews

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