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An Unnatural Vice

(Sins of the Cities #2)

4.22  ·  Rating details ·  2,946 ratings  ·  587 reviews
In the sordid streets of Victorian London, unwanted desire flares between two bitter enemies brought together by a deadly secret.

Crusading journalist Nathaniel Roy is determined to expose spiritualists who exploit the grief of bereaved and vulnerable people. First on his list is the so-called Seer of London, Justin Lazarus. Nathaniel expects him to be a cheap, heartless f
Kindle Edition, 238 pages
Published June 6th 2017 by Loveswept
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Anne Not strictly speaking, but I think it helps a lot. It is definitely a sequel and there are lots of references to the events of the previous book. So r…moreNot strictly speaking, but I think it helps a lot. It is definitely a sequel and there are lots of references to the events of the previous book. So reading the first book will increase your enjoyment of this one. The story is a continuation of the story in the first book. And it isn't completely resolved in this book.(less)

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Heather K (dentist in my spare time)
*4.5 stars*

Excellent, excellent, excellent! This book is simply K.J. Charles doing what she does best.

I'm a huge K.J. Charles fan, but I was a little worried about this series. I'm not a huge fan of suspense and mystery, and the fact that the stories in all three books link together in a "to be continued" kind of way worried me. I wasn't crazy about An Unseen Attraction, but the characters in An Unnatural Vice just spoke to me.

I am loving enemies to lovers more and more, and here we get the i
Erin *Proud Book Hoarder*
I think this is supposed to be a trilogy like Society of Gentlemen was. The first book, An Unseen Attraction, introduced endearing, naïve Clem who found his love interest and also showed his other friends, part of a close group of likeminded individuals (like Society of Gentlemen.) Besides being historical, that's where the similarities seem to end.

While I enjoyed the first of the series, this one was even better. K.J. Charles gave one character a truly horrible, detestable profession and made h
Sam (AMNReader)
Reread December 2019: hi, hello, yes, I am now referring to this book as "the worst" because it ended again.* Will have to read a third time to see if it happens again.

*Do not get me wrong, this book has near-perfect pacing.

If anyone needs me, I'll be stitching J&N on my pillows. Thank you, good night.

(Reread #8 completed)

______Original Review___

“Tell you what, my spirit guide’s a fucking tart.”

I lived in this book. I don't know what else to say. Few books hit me with the intensity that this
Jun 12, 2019 rated it really liked it
This was my first MM romance (we'll I've read ones that included MM but it wasn't the central focus or it also included a woman thrown into the mix). I enjoyed this quite a bit! Nicholas was perhaps a little flat minus his grief for Tony, but Justin was a much more nuanced character that I was fully into. The background mystery didn't interest me as much, perhaps because I missed the first book. I'd definitely read another book by this author but not one from this particular series I think. ...more
Group unicorn review with Adam and Chelsea

4.25 Hearts
--Once again, KJ Charles blew my expectations to smithereens after reading An Unnatural Vice.

Once again, she delivered word porn to savor. And wrote a mystery arc that I was fully engaged with and can't wait to be solved.

Once again a set well written characters that I just wanted to pick apart and re-read over and over.

The leads in the second in Sins of the Cities series, are the serious, crusading former lawyer, now journalist Nathaniel Ro
~Mindy Lynn~
4 spiritualism stars!

I enjoyed this one much more than I did the first one which I can only hope will get even better with the last book in the series.

Justin Lazarus was by far the most interesting character so far in this series. I really enjoyed the back and forth bickering between him and Nathaniel. These men didn't know if they wanted to fight or strip down and get their sexy on. Sometimes they ended up doing both. There was no lack of steam in this book. The sexual tension was strong as w
May 04, 2017 rated it liked it
Shelves: fr, romance-hist, ng
Men on opposite sides.

Nathaniel Roy and Justin Lazarus are two miserable bastards that don't really evoke sympathy at the onset of the book. Possessing diametrically opposed viewpoints of the world it makes for an interesting discussion as the book progresses. I can't say that either character is endearing, but the gulf between the two has a bridge and it is traversed as they begin to understand the basis for each other's stance. But, I just never felt invested in either one.

While I enjoy Charl
K.J. Charles
The second book of my Sins of the Cities trilogy that begins with An Unseen Attraction. In which the plot thickens, and so does the atmosphere.

Justin Lazarus, the Seer of London, is a fraudulent spiritualist, plying his trade on the grieving and gullible. This puts him on a collision course with Nathaniel Roy, investigative journalist. But the men are linked in a number of ways they don't expect. As both family secrets and blood continue to spill, and the worst fog of the nineteenth century clo
The feeling that washed over me when I finished An Unnatural Vice isn’t one I experience all that often, but I suspect we all know what it is; that wonderful sense of awe and sheer elation that settles over you when you’ve just read something incredibly satisfying on every level.  A great story that’s excellently written and researched; characters who are well-drawn and appealing; a book that stimulates intellectually as well as emotionally… An Unnatural Vice has it all and is easily one of the ...more
Nenia ✨ I yeet my books back and forth ✨ Campbell

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California is having a devastating heatwave statewide right now, so it was nice to pick up this book with its icy looking cover and Gothic, foggy London setting, while trying to ignore the scorching temperatures outside. I *almost* wanted to reach for a scarf. K.J. Charles was that convincing in her narrative. (Maybe her next story will take place on a cruise ship in the Arctic - please.)

Sins of the Cities is K.J. Charles's newest serie
Jul 04, 2017 rated it it was amazing
Absolutely stunning!

An exceptional enemies to lovers romance.
These two guys REALLY loathe and despise each other when they meet.

Nathaniel is glorious: a man of stature, honest, good, upstanding and gorgeously hairy (sorry, my mind just went off tangent there *G*), and he has barely recovered from the death of his long term lover. He hates what Justin represents: “the exploiter, the liar, cheat, kiter, and fraud”.

The thing is: Justin really is all that. For the first third of the book I coul
Nov 25, 2017 rated it it was amazing

Justin and Nathaniel might just have replaced Julius and Harry from A Fashionable Indulgence as my favorite couple. And I love those two idiots to pieces! But these two just resonated with me on a more personal level (mostly because Justin might be even more fucked up than I am, and I could totally emphasize with the poor thing), and oh the feels....

Anyways. This book picks up right where An Unseen Attraction left off (in fact, the beginning of this one take
An Unnatural Vice is the second book in K.J. Charles' Sins of the City series. The two books occur pretty much concurrently and you really need to read An Unseen Attraction first.

Nathaniel Roy is an impressive man - wealthy, handsome, sure of his position in the world and absolute in his convictions. Formerly a lawyer, he is now an investigative reporter and he's got his sights on Justin Lazarus, a despicable low-life spiritualist who calls himself the Seer of London. Nathaniel is confident that
Apr 16, 2017 rated it really liked it
Shelves: arc, historical, 2017

This book is like a Fast and Furious action movie - from the first kick of the ball, the action on the ground moves so fast that I was left breathless at the end whistle. Whilst craving for more as we are now in the middle of the story and I do want to read the end bit yesterday before tomorrow.

A'la Charles this story has become quite intricate, tangles within tangles. I was indeed happy to have deducted a solution to a particular tangle before the reveal. Felt like a feat.

Over all considering t
h o l l i s
Justin Lazarus was without a question a disgraceful fraud, but as as his lips moved in silent prayer, Nathaniel could not help the thought that he looked like a glorious fuck.

Now this is the kind of book by Charles I've come to love.

"I wish I could say I was someone else underneath, but I'm not."
"I wish you understood that I don't want someone else."

AN UNNATURAL VICE picks up midway during book one in the Sins of the Cities series. The plot that began in book one is still present in the sequel (
Group review with Baby and Chelsea

Nathanial Roy and Justin Lazarus are two completely different men. From the moment they meet, they’re at each other’s throats. The mutual dislike is intense. But underneath that, there’s also a strong current of desire.

Most of Nathaniel and Justin’s issues boil down to the fact that they see the world differently. Nathaniel wants justice and order. Justin see life as a jungle - you either eat, or get eaten.

Justin seems cold and aloof at first, but I was immedi
4 hearts!

Well Nathaniel and Justin couldn't have been more different from Clem and Rowley and as such we got an entirely different type of story! Where Clem and Rowley were all sweet explorations and careful considerations, Nat and Justin were all hateful fucks and shoving their opinions in each other's faces.

When we get down to brass tax, Justin is a liar who literally doesn't give a shit about anyone or anything other than himself and the two girls who live with him. Nathaniel has a very stron
4.5 stars

Thank you very much to Random House Publishing Group – Loveswept for providing a copy of the novel in exchange for an honest review.

Every time I read a new K.J. Charles book I always think she can’t possibly do better than her previous novels, and I am always, happily, proved wrong. An Unnatural Vice was no exception, featuring an insidious murder mystery, a crafty fraudster, a crusading gentleman journalist, and a passionate romance – this book was impossible to put down.

As usual, Cha
Mar 02, 2017 rated it it was amazing

He had never in his life been with anyone whose will was as strong as his own. This didn’t feel like a flirtation; it felt like stags circling, antlers ready to clash.

An Unnatural Vice is an enemies-to-lovers story at its best. The animosity in the beginning and the undercurrent of attraction are palpable and believable. Moreover, since we get both point of views of Nathaniel and Justin in this book, we are able to like and understand them both early on, while they are still resenting the hell o
I've given this an A- for narration and an A for content at AudioGals

An Unnatural Vice is the second book in K.J. Charles’ Sins of the Cities series, a trilogy set in late Victorian London which revolves around the search for the missing heir to an earldom. Each book features one central couple whose romance is complete by the end, but the overarching story of blackmail, bigamy and murder is carried through each one, so while it’s possible to enjoy the books on their own, I’d recommend start
Jun 07, 2017 rated it really liked it
Shelves: m-m, historical, hate-sex
Favorite Quote: "You - are the worst man - I have ever met."

Lazarus's teeth scraped his shoulder. "And yet here you are, under me...."

Guys, there is hot hate sex in this book. Do I need to say more?

The Seer of London, Justin Lazarus, makes a living calling spirits from beyond the veil, gladly taking people's money to tell them what they want to hear from their deceased loved ones. Can he really talk to spirits? No, but he doesn't feel bad about making a living deceiving people. Justin grew up po
He was a journalist on a quest to uncover charlatans exploiting the grief and pocketbooks of those who have lost loved ones. His number one target is the Seer of London, Justin Lazarus, but Nathaniel Roy had no idea what he would discover when he went undercover.

These two “enemies” would find themselves wrapped up in aristocratic intrigue where no one can be trusted, except each other, but will their growing feelings cloud their judgement? What really goes on behind the London fog?

Set in Victori
4.5 stars

Oohh.....I really liked this enemies to lovers story. The story starts with Nathaniel investigating Justin's psychic business. Nathaniel's convinced Justin and all others like him are just out to scam people and he despises how they use people's vulnerabilities against them. Unfortunately for Nathaniel he has a pretty serious vulnerability himself. He desperately misses his deceased partner and there is a part of him that wants Justin to be legitimate.

Justin is not legitimate. Justin is
May 02, 2018 rated it it was amazing
Shelves: hr, ocd, perfect, 5-stars, read-2018, m-m
The enemies-to-lovers trope is my least liked one. But 0h look at my favourite shelf or my 5-star-shelf. I see lots of books with that trope.

If written as beautifully as in An Unnatural Vice, if executed as perfectly, if as atmospheric as it is here, the enemies-to-lovers trope delivers the most delicious and fun books, with the bonus of in-depth characterisation, too. And, oh wow, does An Unnatural Vice deliver.

I'll say this again and again. There's a reason why I'm letting months pass with a
Kaje Harper
This is another enjoyable historical series from K.J. Charles, this book with an enemies-to-lovers theme, where the first was sweet friends-to-lovers. This second book picks up the threads of the ongoing mystery from the first, so they should be read in order, despite featuring a new couple.

I really enjoyed Justin, a man making a living by his wits and the skill of his hands as a fake-medium. He lives by taking coin from the gullible for a mystic performance of spirits and contact with the dead.
Sep 23, 2017 rated it it was amazing
Wow, this book can’t be more different from the first one. Nathaniel and Justin are not only opposite pole between each other but also between Clem and Rowley story. This wasn’t sweet and awkward. This was more aggressive, with hate sex and bickering that is definitely my favorite part of ‘enemies-to-lovers’ story.

Undoubtedly, this book was splendid! So, so great!

The characters were more complex in this story and that made me enjoyed it so much more.

Tall, dark, hairy and blue-eyed Nathaniel Ro
3 stars for the narrator. He's not bad, I'm just not a fan.
2.75 stars for the story.
Ah! I loved this!

I didn't read the first book in this series, but it didn't make this a confusing read or anything like that. It explained what had happened in the first book as things happened to the MC's in this book, so I was able to understand the main storyline fairly well.

I loved Justin and Nathaniel together. This story had a good enemies-to-lovers type feel and enemies to lovers is my bread and butter so I LOVED it. I think whenever these two fought or tried to one up the other, they b
Oct 26, 2017 rated it liked it
Ughhhh, excuse my lack of impressive language but this to-be-continued ending really annoyed me. The mystery subplot stays undefined, with continuation in the next book.

While I enjoyed reading Nathaniel and Justin's lust/hate relationship and the erotic games of submission (the scene when Nathaniel fucked Justin over the terrifyingly shaky banisters was memorable), I wasn't completely sold on the romance by the end. I loved Justin (the rogue, the cheat, and the liar), but I found myself at time
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KJ is a writer of romance, mostly m/m, historical or fantasy or both. She blogs about writing and editing at

She lives in London, UK, with her husband, two kids, and a cat of absolute night.

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Other books in the series

Sins of the Cities (3 books)
  • An Unseen Attraction (Sins of the Cities, #1)
  • An Unsuitable Heir (Sins of the Cities, #3)

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“Justin Lazarus was without question a disgraceful fraud, but as his lips moved in silent prayer, Nathaniel could not help the thought that he looked like a glorious fuck.” 5 likes
“No strings, Justin. I want you on your feet, not your knees, and I'd rather see you presiding at the seance table than hungry or desperate. I don't want you to capitulate. I never want you to do that. Merely, I would take it as a very great favour if you'd please, please let me give you back your freedom to choose.” 3 likes
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