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Diamonds: Aces Underground Two

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The deeper you go down the rabbit hole, the darker it gets…

Alissa Maravilla thought she was ready for Maddox Hathaway's world—the intensity, the heat, the exquisite chaos. Their passion is electric and undeniable, but so are the secrets they've uncovered beneath the surface of Aces Underground.

The club that awakened her deepest desires is hiding something far more sinister than velvet ropes and whispered fantasies. And Alissa can't look away. Not when people are begging for help.

Not when the dead are piling up—and she may be next.

Not when the truth is bleeding through the cracks.

The two lovers vow to stop the madness.

But Maddox has secrets of his own, memories buried deep inside his subconscious that he's tried hard to forget.

Because some doors should never be opened.

And some rabbit holes lead straight to hell.

289 pages, Kindle Edition

Published August 19, 2025

104 people are currently reading
68 people want to read

About the author

Helen Hardt

204 books8,353 followers
#1 New York Times, #1 USA Today, and #1 Wall Street Journal bestselling author Helen Hardt's passion for the written word began with the books her mother read to her at bedtime. She wrote her first story at age six and hasn’t stopped since. In addition to being an award winning author of contemporary and historical romance and erotica, she’s a mother, an attorney, a black belt in Taekwondo, a grammar geek, an appreciator of fine red wine, and a lover of Ben and Jerry’s ice cream. She writes from her home in Colorado, where she lives with her family.

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5 stars
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Displaying 1 - 19 of 19 reviews
Profile Image for Corinne Akers.
1,170 reviews8 followers
August 21, 2025
Diamonds

WOW! This book was literal perfection! Brilliant! Brilliant! Brilliant! Everything you could ask for in a book!! Mystery, intrigue, suspense, drama and even romance. Just when Maddox and Alissa think they can finally trust someone - nope, they are betrayed once again. The things that happen at Aces Underground are not meant to be shared outside of the walls and the Queen of Hearts is always watching. Will Maddox and Alissa make it out in one piece? Only time will tell. I cannot wait for the next book to drop! Clubs cannot get here fast enough!! ⭐️⭐️⭐️⭐️⭐️
48 reviews2 followers
August 19, 2025
I am loving the Aces Underground series so much. Maddox and Alissa’s relationship is full of mystery and suspense. A definite winner and must read.
Profile Image for Debbie.
15 reviews1 follower
August 19, 2025
What a web Ms. Hardt has spun. The mysteries of and within Aces Underground are starting to come to the surface. Just when Maddox and Alissa think they have found someone they can trust with the things they have uncovered so far, that rug gets pulled out from under them. The more they uncover, the more they're in danger. I'm curious to see if Maddox's perception of his late father changes. I think his father left him "bread crumbs" to the evil that lies within. I think there are clues in the car that was bequethed to Maddox. Only time will tell, and it looks like their time is up..... at least for now. Can't wait for Clubs to shed some light.
Profile Image for Kika Medina.
261 reviews6 followers
August 19, 2025
Helen has done it again. Diamonds is dark, mysterious, enigmatic, and undeniably sexy, with unforgettable characters who shine brightest when they are together. The twists keep you guessing—you never know what’s coming next. Helen’s vivid descriptions draw you in so deeply that you don’t just read the story, you live it: you feel what the characters feel, and experience every moment right alongside them.
Profile Image for Patricia Howard.
658 reviews
August 19, 2025
Wow, I am loving the Aces Underground so far. This is book 2 and is carried over from book one. No I'm not a fan of cliffhangers but I can handle them. If you have read book 1 you will love book 2 as well.

Maddox and Alissa, keep finding themselves in various situations that all seem to revolve around the Aces Underground Club. The story is becoming more interesting as the story goes on. I can't wait to read the next in the series. Both, Maddox and Alissa, find themselves falling in love with each other as time goes by during the revolving issues. I like the twists and turns from the club, it keeps the story going. Each character seems to fall further into the rabbit whole in the story. No one knows who they can and can't trust. Somethings are stirring in this story and they are starting to come to a head with each written word.

Is this the end of Maddox and Alissa? I certainly hope not. I love the story with the couple and the way that they are finding themselves and the way that they seem to be the headline in the story. Maddox promises that Alissa will never be in danger as long as he is present. I can't wait to see if that is true.

Awesome book. If you haven't started the Aces Underground yet.....what are you waiting for.
Profile Image for Serena.
776 reviews21 followers
August 16, 2025
5/5 ⭐️
3.5/5 🌶

Diamonds is book 2 in Helen Hardt's Aces Underground series.

Maddox and Alissa's story continues and the mysteries behind the Aces Underground keep piling up. The more they try to discover the answers to what they've uncovered, the more questions come into the light that need to be answered.
The dangers are elevating as Maddox and Alissa find more evidence that the club isn't all what it seems. When they think a person is trustworthy the ground falls out from under them and they find themselves trapped.

Helen has created a perfect Dark Retelling of Alice in Wonderland and I can't wait to get to the next installment to see what the Aces Underground has in store for Maddox and Alissa.






Profile Image for Carol Ann Doveatt.
561 reviews5 followers
October 3, 2025
Aces Underground #2 Diamonds takes us from story #1 and begins where the first story left off. Maddox and Alissa. Helen Hardt weaves intensity, mystery, murder, and beautiful spicy romance into this second book. There is no one to trust in this underground dark world as they try to unravel the mysterious disappearances and deaths of Aces characters. We see what happened with Alissa and her mother and get more insight into Maddox's family life. I love the side notes of the symphony and classical music, plus cooking. Of course this book ends on a cliffhanger as most of Helen's books do. It will be extremely interesting to see what Rouge and Chet plus all the servers in Aces Underground get up to in the next book Clubs.
Profile Image for Sharon Wingo.
366 reviews10 followers
October 1, 2025
This is book 2 of Aces Underground by Helen Hardt. It starts at the end of Spades and should definitely be read in order. Alissa and Maddox have been in a relationship for 1week and it is so intense, hot, and spicy. They are also intent on solving the riddles from Maddox’s father and whomever slipped them into pocket and purse. They are sure if the riddles are solved they will have answers to what happened to Aces employees that are missing. Rouge seems to be their best suspect. This book has mystery, drama, romance, intrigue, suspense, pretty much the whole gamut. Will these two survive the riddles or are they too far down the rabbit hole?
Profile Image for Linda Dunn.
1,293 reviews29 followers
August 11, 2025
I can't go back to yesterday because I was a different person then...

Whoa, this story has taken quite a turn as Alissa and Maddox delve deeper into the overwhelming mystery that is Aces Underground. Alissa and Maddox have started a dangerous journey they were not prepared for. They are in deep and over their heads in danger. I don't think this is the change that Alissa was expecting when she entered Maddox's life.

They both want to get to the bottom of this insanity, but at what cost? The next book should prove intriguing to say the least. I can't wait!! 
73 reviews1 follower
August 23, 2025
Wow is right!! Diamonds is the second book in the Aces Underground series and it continues with Maddox and Alissa’s crazy fast sexy love story but it’s full of mystery and suspense. What is really going on at Aces? Will Maddox and Alissa make it out alive and take down Mrs. Rouge? You have to read to find out. Clubs is next! Another cliffhanger too. Helen the Queen of Cliffhangers strikes again, and I can’t wait for more!
274 reviews3 followers
December 31, 2025
Helen grabs you and keeps your attention.

Alissa and her boyfriend Mr. Hathaway find the head of May, a server from Aces Underground. They finally start to figure out what Maddox's father's riddle. They are hot on Routes tail and think they have found all the evidence they need to turn Rouge into the police. However, they need a plan to make this happen. They think Chet is on their side. What happens in the next book Clubs may have the answer.
Profile Image for Mrs Claire.
143 reviews2 followers
January 27, 2026
Diamonds is the 2nd book in the Aces Underground series and WoW.

Maddox & Alissa's story continues for the 1st book Spades, with more Aces Underground mysteries unfolding are they safe or are they putting themselves in more danger? When they think they have someone on their side that they can trust everything is swept from under them.

A dark version of alice in wonderland and what a version, keeps you gripped.
Ready for book 3 Clubs 😍
61 reviews
August 23, 2025
Wow! Diamonds is another amazing book in the Aces Underground series. Maddox and Alissa continue their romance and the mystery continues as they continue down the rabbit hole!

Helen Hardt has written another amazing book and as always leaves the reader wanting more! The Queen of Cliffhangers didn't disappoint! Can't wait to read what is going to happen next!
Profile Image for Lisa Reads .
230 reviews
September 9, 2025
Book two of Aces Underground....I had to drag myself thru but made it to the end where the twist comes, now we wait for the next book to find out how they make it out the hole they have fallen into searching for answers
Profile Image for Michele.
1,158 reviews
February 13, 2026
Oh my gosh this series is great. Unique twists and the action and excitement of the mystery totally has me sucked in. While I like the characters and the romance, it’s actually second to everything else
Profile Image for Nicole Collins.
1,399 reviews13 followers
August 10, 2025
so intense. love this dark and interesting fairy tale retelling. this couple is so endearing. their pasts have been so tragic. cant wait to see what happens next.
Profile Image for MaryAnn Costanzo.
267 reviews
August 19, 2025
HOLY CRAP!!! Okay hang on because this one is beyond the imagination... Rouge is involved in lots..So Alissa and Maddox find the answers to riddles they don't like what they have found and it might actually put their lives in danger. Thinking they have found allies it turns out you can't trust anyone.

I CAN'T WAIT to get my hands on the 3rd installment. Let's go team Maddox
Profile Image for Sparklin C Reads.
2,007 reviews
August 19, 2025
Aces Underground -
Spades
Diamonds

You should definitely read Spades first. As the storyline and characters carry over. Wow,
these two are bound and determined. As a couple to figure out what kind of secrets Aces holds. All while each dealing with their past turmoil.
Displaying 1 - 19 of 19 reviews

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