Play Book of Monsters with Crypto at Cloudbet

Book of Monsters is a 7x7 virtual slot from Pragmatic Play that swaps paylines for clusters and leans hard into chaos. With a max win of 5,000x, high volatility, and an RTP of up to 96.5%, it’s built for players who want high-risk sessions with real progression and payoff potential.

You can play Book of Monsters at Cloudbet using Bitcoin, Ethereum, USDT, or other supported coins. You get all the benefits of blockchain technology, including privacy and rapid transaction, which is great, but you also get access to a $2,500 Welcome Package, giving you more chances to chase the big payouts from this online casino game.

What is Book of Monsters?

Book of Monsters is a 7x7 cluster-pays online slot where wins come from matching five or more symbols that connect vertically or horizontally. Instead of spinning reels and paylines, symbols drop into place on a grid and winning clusters disappear to make room for new ones. The bigger the cluster, the higher the payout.

The main twist is the Fat Symbol feature. In the bonus round, one monster symbol is chosen to grow in size as you collect more of it. It starts at 1x1, then gradually increases up to 7x7, covering the entire grid if you collect enough matches. Each growth stage gives you more free spins, and the larger the monster balloons, the easier it is to build huge wins off a single drop.

You can trigger free spins by landing 4 or more scatters. There’s also an optional gamble mechanic before the round starts, letting you risk your spins for more of them—or a better Fat Symbol. If it fails, the bonus is gone.

Why do players love Book of Monsters?

There are thousands of slots to choose from, but there’s something about the Book of Monsters game that keeps people coming back. It gives players something to work toward, and that sense of progress creates tension, especially during longer sessions.

1. The bonus round moves with purpose: Once your Fat Symbol is selected, you’re collecting matches to grow it. Each upgrade expands its size and unlocks more spins. You can see the shift on the board with every stage.
2. The gamble option puts the choice on you: Before the round begins, you decide whether to risk your setup for a stronger one. That single decision shapes how the game plays out.
3. You’re rewarded for keeping the round alive: Instead of aiming for one perfect cluster, the goal is to stay in long enough to keep building. That structure gives players a reason to stay focused.
4. The layout stays clean: Cluster games can easily get noisy. Book of Monsters doesn’t. It’s easy to follow what’s happening and see where the next move could lead.

How to play Book of Monsters

1. Choose your stake: You can bet anywhere from $0.20 to $240 per spin, or up to $480 with the Ante Bet active. It’s a high-volatility slot, so it’s worth picking a level that allows for longer sessions.
2. Spin to form winning clusters: Clusters of five or more matching symbols, connected vertically or horizontally, create wins. Winning clusters disappear and new symbols drop in from above.
3. Trigger the bonus round with four or more scatters: This awards between 5 and 8 free spins. Before the round starts, you’ll be assigned a Fat Symbol and can choose to gamble for more spins or a higher-paying symbol. If the gamble fails, the round is lost.
4. Collect matching symbols to upgrade the Fat Symbol: One monster ‘Fat’ Symbol starts as 1x1 and can grow up to 7x7. Each growth stage adds 1 to 3 more spins and increases your win potential.
5. Use Bonus Buy or Ante Bet for faster feature access: You can pay 100x your stake to buy the bonus directly, or double your stake with the Ante Bet for a higher chance of triggering free spins.

Top tips for winning at Book of Monsters

This is a high-volatility online slot, so wins won’t come consistently. And, while there’s no strategy that guarantees a payout, there are ways to manage your session and make more profitable decisions 

Don’t chase oversized symbols in the base game

Fat Symbols can appear during normal spins, but they’re rare and often don’t connect. They look dramatic, but most of the time the base game is about balance, not blowouts. Bet at a level that lets you ride out the wait for free spins.

Decide how you’ll approach the gamble before it appears

The gamble option before the bonus adds risk, and if you lose, the round is gone. Know in advance whether you plan to take it or not, based on your balance and appetite for risk. Don’t make the decision on tilt.

The upgrades matter more than the base win

You don’t need to land a big win early in the bonus. What matters is collecting enough symbols to grow the Fat Symbol. Each upgrade increases the chance of something landing hard, and the extra spins give you the time to get there.

Keep an eye on your session length

This is the kind of slot that rewards longer play, especially if you're trying to build through the Fat Symbol stages. But it can also turn fast. Set a stop point before you start and stick to it if things don’t go your way.

Why play Book of Monsters with crypto at Cloudbet?

The main reason to play with crypto at Cloudbet is the $2,500 Welcome Package. New players get to unlock potentially massive welcome rewards with 10% cashback on all bets for their first 30 days, plus daily cash drops through a rolling rewards calendar.

You also get the advantages of blockchain. Deposits and withdrawals are rapid, and your information stays private—no banks, no delays, and no need to hand over personal details. For a high-volatility virtual slot like Book of Monsters, that kind of freedom and speed makes every session more enjoyable.

How to start playing the Book of Monsters game with Cloudbet

1. Create a Cloudbet account to get started. It’s quick, free, and only takes a few clicks.
2. Choose your preferred coin and fund your account. Cloudbet supports Bitcoin, Ethereum, USDT and several other cryptocurrencies.
3. Head to the casino lobby and search for Book of Monsters. You can test it in demo mode or jump straight into real play.
4. Set your stake and launch the game. Look out for winning clusters, scatter symbols and the Fat Symbol progression during the bonus round.

Ready to face the monsters?

Book of Monsters gives you big volatility and the kind of bonus round that rewards players who stick with it. Play now at Cloudbet with crypto and unlock your $2,500 Welcome Package for 10% cashback and 30 days of daily rewards.

If you love slots, we have a huge library to choose from, including fan-favorites like Book of Dead and Book of the Fallen.