Carl’s Doomsday Scenario by Matt Dinniman: Carl Learns to Play the Audience

Carl’s Doomsday Scenario is the second Dungeon Crawler Carl book, and it’s the one where I stopped wondering whether Matt Dinniman could keep this up and just started trusting him. If the first book was about an ordinary man surviving a deadly game show, this one is about him getting good at it. Carl stops being a clueless contestant and starts becoming a star, and that shift is the most interesting thing happening under all the chaos.

I had a great time. It’s still fast, funny, and gloriously stupid in the best way, and it deepens the series’ one real idea rather than just running the same play again. I also had one genuine reservation about how the book is built, which I’ll get to. First, a quick warning: to talk about book two at all, I have to spoil where book one ended and how the world works. I’ll keep Carl’s Doomsday Scenario itself clean until a clearly marked section later on.

Previously, on Dungeon Crawler World

Here’s the setup, for anyone who needs it. Aliens demolish the surface of Earth in an instant, wipe out most of humanity, and convert the planet into an eighteen-floor dungeon. The survivors become contestants on Dungeon Crawler World, a reality show watched by trillions of aliens across the galaxy. You descend floor by floor, fighting monsters, leveling up, and grabbing loot, and your survival depends as much on your popularity as on your sword arm. The detail that still unsettles me most is that these aliens were always here, parked and waiting for this year’s crawl, patient as a network sitting on a hit franchise.

Book one left Carl and his ex’s magic-wielding show cat, Princess Donut, descending toward the third floor with Mordecai, a former crawler turned trainer who is himself trapped in the game year after year. If you want the full pitch, my review of the first book covers it. Carl’s Doomsday Scenario picks up right there, and almost immediately changes shape.

“Mongo is appalled.”

From dungeon crawl to open world

The biggest change, and my one real gripe, is structural. Book one was a dungeon crawl in the classic sense: tight tunnels, contained levels, and the constant thrill of not knowing what waited around the next corner. Book two trades that in. The third floor is a sprawling open world, a huge city level with its own laws, factions, and quests, closer to an open-world RPG than a dungeon. Carl and Donut spend most of the book on this single massive level, taking quests, chasing rewards, and interacting with a whole populated world.

My honest first reaction was mixed. I missed the claustrophobia. In an open world, you can see the challenges coming from a distance, and some of the tension and mystery that made book one so propulsive leaks out. The pacing slows, especially across the two big quests that anchor the floor: one is a delight, the other overstays its welcome. For a stretch, I thought the series had traded its best trick for a more ordinary fantasy adventure.

And then, honestly, I talked myself partway back. The quest structure buys something real: room for Carl to strategize and plan instead of just react, more space for character, and the specific satisfaction of clearing objectives and banking the rewards. I happened to be replaying Baldur’s Gate 3 while reading, and there’s a shared pleasure there, the click of finishing a quest and watching your character grow. It’s a different rhythm from book one, not a worse one, and by the end, I’d made my peace with the trade.

Book one was about surviving the show. This one is about working it.

Here’s the thread that makes Carl’s Doomsday Scenario more than a fun sequel. The open-world floor changes more than the scenery. It changes the entire lens. Book one dropped Carl into the machine and asked whether he could survive being turned into content. Book two is about what happens once he understands the machine well enough to use it. He learns which cameras are on him, which sponsors to court, and how being watched can be a weapon instead of just a threat. The contestant is becoming the star.

“‘Cats don’t drink cocktails,’ I said.

‘Cats don’t shoot lasers from their eyes, either, but here we are, Carl. Mama needs a night off.'”

Dinniman builds the whole floor to make that literal. The third-floor city is openly a stage, right down to a class of powerful residents who are running their own shows within the show. It’s the clearest the series has been that this is all television, and Carl’s growing fame starts to bend the story around him. The satire I loved in book one is still doing quiet work here, and it’s sharpened, moving from the fear of being watched to the craft of performing.

Spoilers ahead for Carl’s Doomsday Scenario

The rest of this section discusses the third floor’s quests and how the book ends. Skip to “What still makes it a blast” to stay clean.

The third floor is called the Over City, and the book makes it clear up front that it’s a set. It’s an illusion built under the Earth, dressed as a lived-in city and populated with engineered residents, some of whom, the Elites, star in their own broadcasts. The two quests I mentioned are where the floor lives: a murder investigation in a grim little settlement, and a plot centered on a traveling circus. One of them, the investigation, is the book at its best: tense, strange, and sad. The other sprawls, which is where my pacing complaint comes from.

What ties it together is a moral choice the book keeps forcing. Mordecai’s advice is coldly practical: ignore the side stories, skip the suffering you can’t fix, clear the floor, and stay alive. Carl can’t do it. He keeps stopping for people the game has written off, and that refusal is both the most human thing about him and, in a show that rewards a compelling protagonist, his best career move. His compassion is real, and the audience eats it up. Dinniman lets those two truths sit next to each other without flinching, which is more thoughtful than a book with this many fart jokes has any right to be.

By the end, Carl clears the Over City, comes out more famous than ever, and gets his hands on a world-ending weapon. That’s the doomsday scenario of the title. The bomb gives him leverage over the people running the show, rather than being one more catastrophe that lands on him. He walks onto the fourth floor as something the dungeon and its producers didn’t plan for: not a contestant they can steer, but a star with a bomb. That’s a fantastic place to leave a series, and it’s the payoff of everything the book is quietly building toward.

What still makes it a blast

All the reasons to love Book One are still here. Dinniman keeps nailing the balance of absurdity and action, throwing Carl into ever more ridiculous situations with ever more ridiculous rewards. The humor stays sharp, sometimes juvenile, sometimes genuinely witty, and the set pieces are as zany and high-energy as ever.

The heart of it is still Carl and Donut. Their banter has only gotten better, and Donut has grown from a scene-stealing gag into a real character who carries emotional weight, not just punchlines. Book two also gives Donut a velociraptor named Mongo, which is exactly as great as it sounds. Some of the new side characters are thinner than I’d like, more function than person, but the core duo is so strong that I didn’t mind spending a whole sprawling floor with them.

Listen to it, again

I said it about book one, and I’ll say it louder here: the audiobook is the way to do this series. Jeff Hays is a god-tier narrator, and calling what he does “reading” undersells it. The voices, the accents, the comic timing, his Princess Donut, all of it lifts the material to another level, and he’s among the best I’ve ever heard. One practical note: the Dungeon Crawler Carl audiobooks are Audible exclusives, so you won’t find them on other audiobook stores, which is why there’s no audiobook link in the affiliate block below. If you’ve never tried an audiobook, this is still one of the best possible places to start.

Should you read it?

Yes, with the obvious caveat that you should read book one first. Carl’s Doomsday Scenario is another blast, and it’s the book that turned me from “this is fun” into “I’m in for the whole series.” The open-world shift is a real change, and whether it lands for you will depend on how much you loved book one’s tight, claustrophobic crawl versus a bigger, quest-driven world. For me, the trade mostly paid off, and the deepening of Carl’s story more than covered the loss.

If you’re on the fence about starting the series, this is a good moment to jump in. Eight books are out as of 2026, with Dinniman planning to close it out at ten, so there’s a long, mostly complete run waiting for you, and a Peacock live-action series on the way. Grab book one, ideally on audio, and let Jeff Hays do the rest.

Read Carl’s Doomsday Scenario yet? Did the jump to an open-world floor work for you, or did you miss the tunnels the way I did at first? Tell me in the comments.

Read Carl’s Doomsday Scenario yourself

Mysterious Galaxies is a Bookshop.org affiliate. If you buy the book through the link below, the channel earns a small commission at no extra cost to you. The Dungeon Crawler Carl audiobooks are Audible exclusives, so there’s no audiobook link here.

FAQs

Sources

• Dungeon Crawler Carl, Wikipedia (the series overview, Matt Dinniman, the self-published origins and Ace editions, book count, and the Peacock adaptation)
• Carl’s Doomsday Scenario, Dungeon Crawler Carl Wiki (the third-floor Over City, the quests, Mordecai and Mongo, and the book’s events)
• Carl’s Doomsday Scenario, Penguin Random House (Ace) (publication details for the current edition)

SOURCE · Matt Dinniman, Carl's Doomsday Scenario (published 2021). SERIES · Dungeon Crawler Carl.