Gluttony: The Dominant Sinner

by Christi Caldwell

In the long-awaited finale to the Seven Deadly Sins series, the Duke of Argyll—London’s most dangerous sinner—faces the one craving that could destroy him.

He is a duke without restraint.
She was never meant to survive his attention.

Feared and desired in equal measure, the Duke of Argyll has built his life on indulgence—gaming, vice, and pleasure taken without restraint. He does not love. He does not soften. And he certainly does not want a wife.

Until one woman alters the course of his carefully controlled world.

She enters his orbit believing herself easily lost, easily replaced.
He draws her close convinced he can remain untouched.

But when danger closes in and desire sharpens into something neither can control, the man who sought a life without feeling discovers the one woman he cannot afford to lose.

A seductive Regency romance of danger, obsession, and a love that was never part of the plan.

For readers who crave dangerous dukes, emotional intensity, and passion without restraint.

328 pages, Kindle Edition

Published February 13, 2026

About the author

USA TODAY Bestselling author CHRISTI CALDWELL blames Judith McNaught's "Whitney, My Love!" for luring her into the world of historical romance. While sitting in her graduate school apartment at the University of Connecticut, Christi decided to set aside her notes and pick up her laptop to try her hand at romance. She believes the most perfect heroes and heroines have imperfections, and she rather enjoys torturing them before crafting them a well deserved happily ever after!

Christi makes her home in Charlotte, North Carolina where she spends her time writing her own enchanting historical romances, and baking surprisingly good cakes (almost 2 years in lockdown will do that) with her courageous son and twin daughters, each who with their daily antics provides limitless source material.

Reviews

[L J · Rating 5 out of 5]

This is the seventh book in a series from this author, in which each book illustrates one of the seven deadly sins through its characters.
In this tale, the Duke of Argyll, Gregory Goodheart, is the bad boy that every woman has chased yet still slips through their fingers. He has excessive wealth, seductive charm, good looks and no desire to ever marry.
Miss Daria Kearsley is odd. She is definitely a wallflower, usually clad in black funereal dress, but it doesn't bother her. She is concerned with more ethereal pursuits. Daria has a special ability that has placed her in a rather sticky situation, and the only solution, in her mind, is to make a major change. Daria must convince a complete stranger to marry her, and he is the Duke of Argyll.
There is nothing like a reformed rake now is there? The question is will she reform him. Is that something she even desires or has the time to do?
This story is unique, quirky, has humor and heat. I thoroughly enjoyed it. It makes me want to reread the entire series all over again.
I received an advance copy of this book. But my opinions are my own.

[Janet · Rating 5 out of 5]

Gregory, Duke of Argyll is a duke without restraint. Daria Kearsley was never meant to survive his attention. Feared and desired in equal measure, the Duke of Argyll has built his life on indulgence—gaming, vice, and pleasure taken without restraint. He does not love. He does not soften. And he certainly does not want a wife. Until one woman alters the course of his carefully controlled world. The finale of the series & another unputdownable romance. I loved both Gregory & Daria, he’s the consummate rake & she’s a wallflower with a difference. He’s used to women falling over themselves to just be near him, whereas she doesn’t in fact she doesn’t seem interested in him. When he agrees to her proposition he didn’t realise how much his world would be rocked on its axis. I loved it & loved how Gregory was redeemed. It left me with both a smile & a tear
I voluntarily read and reviewed a special copy of this book; all thoughts and opinions are my own

[Lana Birky · Rating 5 out of 5]

Gluttony delivers a wonderfully different flavor from the rest of the series; quirky, unexpected, and quietly powerful. Gregory Goodheart, the Duke of Argyll, is every inch the untouchable rake: wealthy, wickedly charming, and determined to remain unclaimed. Enter Miss Daria Kearsley, the odd, ethereal wallflower in black who sees the world differently and needs a husband for reasons she’d rather not explain. Their dynamic is fresh, funny, and full of surprising tenderness.

What truly elevates this story is how beautifully Christi Caldwell redeems Gregory. She peels back his layers with such care that his transformation feels earned, intimate, and deeply satisfying. Daria’s uniqueness isn’t a quirk - it’s the key that unlocks him. She writes with warmth, wit, and a deep understanding of flawed characters who deserve love, and she makes you believe in every step of their journey. The only thing missing for me was an epilogue, because I wasn’t ready to leave them yet.

[Angela · Rating 2 out of 5]

I am so sad after reading this book. I loved Argyll this entire series. Yes, he is a rake and yes he is sometimes harsh but I like male characters that way. They can be redeemed. I do not think he was done justice in this book. He deserved a better story. I, unfortunately, did not like Daria at all. It was not her oddities, it was that she was dull as dirt. This story was over less than a week and it went nowhere. I can see where others will love this story. The timid woman redeems the big bad rake. I just did not think it worked. I will concede that the end of the story was lovely. I dislike rating books low, I have loved everything Christi has written and was so excited for this story, but it fell way short for me.

[Verna Leep · Rating 4 out of 5]

Best of the Sinners...

Emmy would not do for Argyll. He needed a power beyond what is normal for redemption, and while the paranormal aspect was a little cheesy, the Duke's reaction to Daria was at times funny and kind, something missing in the other Sin books. Another love hate, families fueding, blackmail, compromise blah blah romance would have been boring. Daria and her family were different and Argyll's reaction to them showed he had potential to be a good man. I'm glad he didn't
come across as a pimp and the F word and sex was used sparingly because it left more time for romance. Emmy will get her turn. Perhaps that young Earl or the drunk vicar.

[Melody · Rating 5 out of 5]

The conclusion of the seven deadly sins does not disappoint. This series has been the best yet of Christi’s books.

Argyll is a shallow twisted character with no redeeming values - or is he?

When fate says you must marry a thoroughly reprehensible rogue does Daria have to accept it or can she find her happy ever after?

I’m only sorry that this is the end of this series. It’s been an enjoyable journey through the London underworld.

[Gayla McNicholas · Rating 4 out of 5]

Finally, the delicious Duke of Argyll gets his story! Miss Daria Kearsley is unique, even amongst her unusual family, but endearing in her directness. It was satisfying to read how her forthrightness transformed him. Christi Caldwell is best when she's redeeming rakes and blossoming wallflowers. There is an amusing conversation composed of Shakespeare quotes that was surprising. I wish it had an epilogue. I received an ARC of this book and have reviewed it with my own honest opinion.

[Maria · Rating 5 out of 5]

Loved this passionate, tender steamy romance, absolutely loved Gregory and Daria's story of marriage, passion love and a prophecy that should hopefully never come true.