Sex! Sex and smut! Sex and smut and violence!

My Kindle Unlimited reads this month included a large share of sex and smut. Some because of recommendations pushed at me, some because I was curious about this "spice" of which the kids speak.
Spoiler: it's mostly awful and not worth reading. Some falls in the category of PWP (Porn Without Plot), others seemed to have a little bit of plot accidentally mixed into the porn.
Worth noting that the books I sampled were definitely written for a male audience. I haven't read much female-targeted smut, but from what little I have, I am very aware that these are separate genres. Female smut might have explicit sex and graphic descriptions of organs, but there seems to be a lot more, well, foreplay and buildup and emotional bonding, and I guess cuddling is a thing too.
For the male audience? They pretty much get busy without preliminaries, the women are instantly eager and enthusiastic about the most ridiculous feats of bedroom acrobatics, and the men perform like they have a Viagra gland infusing their bloodstream and cyborg wieners.
Look, I'm a straight dude and no prude, but a 10-page blowjob scene written in the purplest of prose does not arouse me. I can't take it seriously. I can take wizards and cyberspace and elfin girls beating up 300-pound ogres more seriously.
This is not all I read, of course (I can only take so much before my irony gland overloads).
Also I should note, for pedantic accuracy, that not all these Kindle books were available on Kindle Unlimited - sometimes I will just download the sample chapters for a regular ebook. Once again, the fact that I DNF most of these books does not mean they are necessarily bad (or worse than the books I actually finish). But I speed-run through a huge grab bag of books that I sample because they look vaguely interesting, or someone on the Internet said something interesting about it, or I just liked the cover. Only a few make the cut.
All His Angels Are Starving, by Tess C. Foxes

Not much smut, but lots of violence. I finished this one: full review here.
On Astral Tides - Book One - From Humble Beginnings: A Modern-day return of magic LitRPG

Chosen by the Gods, Akio must rise… or fall!
A Heavenly messenger warns of an upcoming apocalypse, thrusting Akio into a new reality filled with endless dangers and miraculous opportunities.
But those who dwell within jealously guard their wealth and power.
Accompanied by an enigmatic and beautiful Faerie princess, the only chance for Akio - and Earth - is to gather companions, level up, and become the unlikely saviours of both their worlds.
When you start from nothing, the only way to go is up!
On Astral Tides is a Light Novel inspired LitRPG containing territory control and alliance building, social aspects, relationships and romance.
DNFed at 1%
Yeah, I barely made it through the first chapter of this. The writing was just so bad. Half-Japanese half-British dude describes his looks in a mirror, articulates every passing thought he has about his boring freelance coding job, and has some text banter with his little sister. I found it cringey and would not even consider it good if found on a fanfiction site. Had no patience to keep reading until something supernatural happened. I don't even know if this one gets smutty.
I Was An OP Demon Lord Before I Got Isekai'd To This Boring Corporate Job...

A wolf in sheeps' cubicles!
Trapped in a corporate hellscape, Vic Legion is shocked when the hot new secretary at Helcom makes some bold claims. Namely, that he is an overpowered demon lord whose identity and powers have all been stripped away by the angels secretly in control of the planet. Only breaking the seven planetary seals upon him can restore him to his original powers and free him from his jailers...and now that he's aware of his true nature, they're going to be in a rush to kill him before he causes a problem.
Sounds a little crazy, right? But when this nutty, busty blonde reveals herself to be a demon slave vowed to his service--in fact, one of four--and the chaos ramps up all around them, Legion has to learn to lean in. As he quickly discovers he's been surrounded by enemies all this time, the trick is going to be balancing his new secret identity alongside work and play...oh, yeah, and staying alive while he hunts for the keepers of the remaining seals.
DNFed at 17%
When you browse manga bookshops like BOOK☆WALKER, you see a lot of titles like this: "How to Treat A Lady Knight Right," "Why Does No One In This World Remember Me?", "The Dorky NPC Mercenary Knows His Place," etc. Very ... on the nose titles, that seem to be spelling out exactly what they are about, a scratch for every itch. I don't think all of these are smut or harem, but I found this title kind of funny. A demon lord who winds up in a cubicle job? Okay!
Well, 17% of the way through, and we've had a busty secretary follow him home, infodump about how he's a demon lord who's been dumped on Earth with no memories and now he's being hunted by angels, and also she's one of four demonesses devoted to his service.
I guess later in the book he meets the rest of his harem, but the first part of the book is like three sex scenes in a row with the first girl. Doesn't seem like there's much room for anything but sex in the rest of the book.
This was basically pure male fantasy (which is all harem novels, I guess): a super-hot girl shows up in an ordinary guy's apartment and says "Hi! You are super-special and have an amazing destiny and you are not the ordinary schmuck you think you are, also let's fuck! Would you like to fuck some more? Hey, anytime you want to fuck just call me, I'll be right over here, ready to fuck!"
Yeah, I mean, I get it. I'm male. It's probably a good thing this stuff wasn't around when I was fourteen, it would have bent me.
The John Blake Chronicles - Volume 1: Three Square Meals

You've just found the ultimate erotic science-fiction series!
It's 2779 and a retired Terran Federation Marine has taken up life as a trader. Follow John Blake's adventures as he travels the galaxy on his freighter, the "Fool's Gold". This is the first book in a massive epic full of beautiful women, rampaging aliens, gunfights, space combat, and a mysterious heritage that will shake the foundations of the galaxy...
A multi-award winning adult space opera by M Tefler.
DNFed at 5%
So way, way back in the day DAW and Ace paperbacks published the John Grimes series, by A. Bertram Chandler. It's about a gritty space captain who is sometimes a freelancer and sometimes a naval officer, working his way up to Commodore, and having lots of space adventures. It's classic golden age space opera, and as was typical in SF written in the 60s and 70s, there are quite a few random beautiful women falling onto his dick. Basically an R-rated Star Trek.
I remember those books fondly. My father introduced me to them (this is his collection, which I inherited), and I read a lot of them before I was even old enough to really be interested in the sexy space ladies.

So, I heard about this "John Blake" series, which apparently sells well enough to make it the author's full time job now. I downloaded a sample of the first book.
It's very close to PWP. John Blake finds a stowaway on his ship, who at first he thinks is a young boy before she reveals that she's actually a petite girl running away from the last planet he was on. But she quickly clarifies that she's 18. So it's all okay when he tells her straightforwardly that he'll let her stay onboard as long as she's willing to service him on demand. She is very okay with this, and the next twenty pages is a lot of servicing. In which we learn that John Black is not entirely human, he has a huge tool with four testicles, and... let's just say it gets weirder from there. I think the author figured out exactly what fetishes there was a market for, and boy does he deliver.
Your Kink Is Not My Kink and Your Kink Is Fucking Weird.
Not judging those who like this kind of thing (okay, maybe a little), but one-handed reading pretending to be a space opera is a pass for me. I wanted a modern John Grimes series, not Penthouse Letters in space.
The Dog Walker, by Rian Stone

Rex has spent his entire adult life running from the shadow of his stepfather — a womanizing,
manipulative man who treated relationships like a game to be won. Now with a successful career
in the Navy and his own firm moral code, Rex tells himself he's nothing like the man who raised
him. He's better than that. He has to be.
But as Rex navigates the complex world of modern dating, analyzing every interaction and
female behavior pattern like tactical data, he begins to see uncomfortable parallels. From married
women to single mothers, fellow sailors, and bachelor party strippers, each relationship forces
him to question whether his calculated approach to romance is really so different from Jon's
manipulations.
In this groundbreaking exploration of contemporary romance from a male perspective, R A
Stone delivers a brutally honest examination of love, self-deception, and the patterns we
create — both to find connection and to avoid it.
With sharp wit and brutal honesty, The Dog Walker challenges our assumptions about
relationships while asking profound questions about authenticity, vulnerability, and the stories
we tell ourselves about love.
DNFed at 16%
This book had a fair amount of sex, but it's not smut. Instead it was an intriguing book recommended by a YouTuber, a "sex and romance" book written by and for a male POV.
I didn't immediately realize that Rian Stone is a Red Pill guy, but this novel was at least more introspective than your typical manosphere ranting about Betas and Shit-Tests. I enjoyed The Dog Walker for a while, but it started to get tiresome because it's just a series of vignettes about Rex, a frustrated young Coast Guard sailor, fucking different women. The pattern is the same for each one: he wants to be a decent guy, not like his asshole stepfather. He's a nice guy who doesn't mistreat or use women! So he overthinks every interaction, seems to have lots of unsatisfying guilt-and-neurosis-afflicted sex, and whines constantly about how things just keep going wrong for him.
Does he eventually get better? Does he learn Frame and Dread and turn into a Chad? I dunno, I got tired of reading about him banging one chick after another and then aftergaming each hookup. In a different mood, maybe I'd have finished this, it is well-written and yes, it's a believable and psychologically insightful novel from the POV of a hapless and kind of annoying dude.
Worth the Candle, by Alexander Wales

Juniper was always the Dungeon Master, never the player. He was always a creator of worlds rather than the one who walked within them…until now.
Somehow, the tables have turned in the most dramatic way possible. Juniper finds himself in a world filled with the wildest fantasies a mind could come up with, and his fingerprints are all over it.
Throughout this world, echoes of his own ideas and plots leave him feeling like he’s always one step behind. He finds bits and pieces of ancient influence strewn about every town he goes through. One thing is clear, though: Juniper walks this magical new world in someone else’s shadow.
It might all add up to something vital...if only he can survive long enough to figure it out.
DNFed at 9%
I was recommended this series repeatedly as a top-tier litrpg. The writing is okay, and there is a hint of psychological depth inasmuch as the main character is introspective and analytical. But after a few chapters I was not sold.
I get the appeal: it's a "rationalist fic" which, if you're not familiar, is a genre of fiction popular in the rationalist community (evolved from LessWrong and Eliezer Yudkowsky of Harry Potter and the Methods of Rationality fame) in which characters spend lots of time really, really thinking about their actions and their consequences. Philosophy, utilitarianism, and game theory are common themes. I would even say Brandon Sanderson and his "magic has rules, which you can discern with enough trial and error" style of writing, is ratfic-adjacent. In Worth the Candle, the protagonist is isekai'd to a fantasy world that appears to be literally based on his own D&D campaigns. He quickly realizes this and besides trying to optimize himself for this environment, flatters the reader by running through numerous explanations for how he wound up here that the genre-savvy reader will no doubt think of. So it's sort of meta with a clever main character, but it's still basically just another story about a dude who's dropped into a fantasy world to become a D&D character.
I remain baffled by people who read very mediocre novels and think they've found a gem because... they're marginally better than most of what you find on Royal Road? I won't say this book is strictly worse than, say, Dungeon Crawler Carl, which I have enjoyed enough to continue, even though the writing often leans on puerile humor and obvious tropes. But DCC is more fun and creative, whereas Worth the Candle seems too much in love with its own conceits.
The Sky That Broke the Hills, by T.C. Rubright and R.E. Rubright

"The Sky That Broke the Hills" is the first book of the "Dire Skies Trilogy," a fast-paced gaslamp fantasy epic that follows young Feldregor "Slaga" Boyden from his time as a mim (military indentured man) toiling away in a backwoods fort in Stheara, all the way to the distant, glittering capitol: Royalist Point.
When he and his friend Floort try to pawn a mysterious watch, he learns painfully that he was born with a condition called sharna macha, in which contact with magic makes him violently ill, but also gives him power: he can disrupt and dispel magical forces. Later, as Floort is about to be unjustly hanged in front of the whole fort, they are attacked by a fierce band of uplanders and a powerful, unseen mage. In the chaos, they escape with the help of a former enemy, the mysterious Major Dietrick. They go off in search of Bill Skye, the Master Witch Warden, who can train Slaga to turn the sharna macha to his advantage, if he can avoid the many agents of the crown, who have banned magic and all who use it. On the road they are attacked by bloodthirsty bandits, dodge cavalry, fight off bounty hunters, corral a wayward airship and more, while Slaga learns what he can do to magic and what magic can do to him.
DNFed at 8%
Well-written, but "gaslamp" was a strike against it, as I just tend not to like gaslamp/steampunk. That said, I might have finished this book if it wasn't telling a story I've read many times before. A pair of lowly "mims" (basically serfs) are conscripted to do shit-work for the army, hoping to one day be elevated to actual soldiers, who will still be treated like shit but theoretically be free man. I already know that of course they will escape their servitude and go on Adventures, but I just don't care about yet another story about expandables going from zero to hero. If you like this kind of story, though, I think it was written at a professional level.
The Last Nazi, by Jeff Putnam

An ancient map. A missing relic. A race against the past.
Smuggler and ex-Army pilot Cole Harper is no stranger to dangerous jobs, but when a sharp MI6 agent pulls him into the hunt for a legendary artifact—the Spear of Destiny—he finds himself facing an enemy he thought was long gone.
From the back alleys of Tangier to the forgotten ruins of a lost Templar stronghold, Harper and his reluctant partner must stay one step ahead of a ruthless ex-Nazi commander determined to seize the relic’s rumored power for himself. But the danger runs deeper than they imagined. Someone inside British intelligence betrayed them, setting them up to fail. And as the pieces fall into place, Harper realizes the war never really ended—it just went underground.
Navigating shadowed ruins, unraveling cryptic clues, and pushing his luck to the breaking point, Harper must use every ounce of wit and grit he has to stop the enemy before history’s darkest legacy rises again.
With gunfights, betrayals, and a final showdown deep beneath the Turkish sands, The Last Nazi is a heart-pounding adventure perfect for fans of Indiana Jones, Uncharted, and Casablanca.
The war is over. The fight has just begun.
DNFed at 10%
Oh, nice AI art on the cover.
(I don't hate AI art. I know it makes a lot of people rage-stroke when they see it, but I just dislike lazy and obvious AI artifacts in a professional product. Use AI, but at least do some photoshopping to fix those googly eyes and insectile airplanes...)
As for the story, it's a pulp adventure that is clearly trying to capture the Indiana Jones fanbase. Cole Harper is a former WWII Army pilot now working as a smuggler in post-war Cuba. There is a dame, of course. A hot femme fatale with ex-Nazis on her trail drags Cole into a running gun fight across Havana; he helps her because of course he does.
The first few chapters were all action and somewhat wooden dialog, and read rather like a YA novel. As a preteen boy I might have liked this, but my tastes now are more discerning and it wasn't original or creative enough to make me read through a lesser Indiana Jones fanfic.
(Also, honestly, the AI art just seemed really low effort.)
My complete list of book reviews.