Book of Monsters Slot

Monster Aesthetics: What the Book of Monsters Game Looks Like

Major kudos for the graphics. Pragmatic Play created a monster-themed slot with a real soul. Everything screams attention to detail: each monster isn’t just a symbol — they’re living characters with their own facial expressions, movements, and personalities. The animations are smooth, vibrant, and at times, even cinematic.

The grid is set deep within a spooky yet colorful cave, where lanterns flicker, chains swing, and potions and eerie shadows flash in the background. The Book of Monsters isn’t just a “floating object” — it breathes, blinks, and flips its pages as if waiting for the perfect moment to reveal itself.

The overall style is reminiscent of Tim Burton’s cartoons: dark, but not in a bad way — more like enchantingly gothic. The visuals pull you in like a movie where you are the main character.

Now let’s talk about sound — the sound design in Book of Monsters slot deserves a separate award. The music is composed with care: you don’t just hear background tunes; you feel like you’re inside a mysterious dungeon. Echoes, ominous whispers, juicy cluster explosions — all create a full-on immersion effect. And if it ever feels like too much — you can always mute the music or adjust the volume to your liking.

The bottom line? The WOW-effect is guaranteed from the very first seconds. Book of Monsters isn’t just a slot — it’s an atmospheric ride.

Symbol Overview

You can’t talk about a slot game without first describing the game grid. In Book of Monsters, you’ll be playing on a 7x7 grid, totaling 49 symbol positions. This monster-themed slot features just 8 types of symbols:

• J, Q, K, A — the standard card values;

• Three regular monsters (purple, green, and red);

• A yellow, horned cyclops (bonus symbol).

In the Book of Monsters demo version, reels spin using the “Drop’n’Win” mechanic. If you land 5 to 49 matching symbols in adjacent positions, you win. Naturally, some symbols are more valuable than others. The highest-paying symbol is the red monster. The lowest-paying is the jack. The image above shows the full payout table for all combinations at a $2 bet.

Hidden Perks and Surprises on the Grid

When we sat down to play Book of Monsters for this review, we were pretty sure Pragmatic Play had hidden a few tasty surprises in the game — and we weren’t wrong. These little surprises spice up the otherwise monotonous spinning — something this provider is quite known for. One of these delightful moments is shown in the screenshot below:

During a routine spin at a $2 bet, the book suddenly opened, revealing the green monster. Moments later, a giant 5x5 monster rolled out onto the grid, matching up with a regular-sized green monster in the 6th row. As a result, we won $60 in that round. Small, but satisfying!

Book of Monsters Bonus Round

When 4 or more yellow, horned cyclops symbols land on the grid, the first phase of the bonus game begins. Essentially, these are free spin rounds, with some special conditions — which we’ll cover shortly. The more cyclops symbols you land, the more initial free spins you receive. Note: only one bonus symbol can land per reel.

The bonus game consists of two phases, both of which we’ll describe in detail below.

If 3 cyclops symbols land, the player receives a win equal to 2x the bet amount — but the bonus round does not activate. You also have the option to buy a guaranteed bonus round for 100x your current bet. There’s also a toggle switch that increases your chance of landing bonus-triggering symbols by 7 times. However, using this feature doubles your stake, while the size of potential rewards remains the same. Is it worth it? That’s up to you to decide!

First Phase of the Bonus Game: The Setup

In the first phase of the Book of Monsters bonus game, the slot gives players two tempting ways to boost their winning chances. Right after the round begins, the Book of Monsters opens up and randomly selects a key symbol for the upcoming phase. Then, the player is given three choices:

• Take a risk and increase the number of free spins for the round;

• Take a risk and boost the value of the key symbol for the bonus;

• Collect the result as-is and move on to the next phase.

The chances of success for each risky option (excluding the last one) are clearly displayed in percentage form on the game’s interface. The best possible outcome heading into the second phase is to have 8 free spins and the red, one-eyed monster as your key symbol. Once these conditions are met, the game won’t allow further risk attempts. Oh well… guess we’re done here!

And now comes the thrilling part — the main bonus round!

Second Phase of the Bonus Game: The Core Round

The player’s main goal during this round is to collect as many key symbols as possible during the free spins. Regular rewards from the base game remain active as well. You can extend the free spins by collecting 30 key symbols — each set of 30 will grant 1, 2, 3, or 4 extra spins.

Additionally, a roaming key symbol will randomly move across the screen throughout the bonus. With every set of 30 collected key symbols, this roaming monster will grow in size. In the screenshot above, you can see how we managed to grow the key symbol to 4x4 during a single bonus round. Landing just one of those bigger symbols awarded us the same payout as 16 of the smaller versions!

However — and here’s the clever twist — this migrating key symbol doesn’t count toward the total needed for the next size-up. With this move, Pragmatic Play smartly limits the bonus round duration. Even if you manage to grow your monster to a massive 7x7, you lose the ability to fuel the upgrade counter. So eventually, your extra spins will stop coming, even if you’re landing 7x7 wins every spin. Classic Pragmatic — always one step ahead!

Book of Monsters Demo: Step into the Cave Without Risk

Ready to dive into the monsters’ lair but not quite prepared to risk your gold coins yet? Then Book of Monsters demo is your ticket to the dungeon — no fear, no losses. It’s a free version of the game where you get it all: visual magic, Pragmatic Play’s signature mechanics, and even a chance to peek into the bonus round without spending a dime.

In demo mode, you don’t just watch — you play: trigger the Fat Symbol, launch the bonus game phases, and watch as giant monsters take over the grid. Think of it like a movie trailer — only interactive and way more exciting.

It’s the perfect option if you want to try things out first, see what it’s all about, and decide whether you’re ready for a real monster hunt. And once you feel like a hero — head over to Memocasino, grab your bonus, and dive in for real wins!

Your Game is Always Within Reach With The Mobile App

There’s no standalone Book of Monsters mobile app yet — but guess what? You don’t need one. You can play the slot directly in your mobile browser, whether on iOS, Android, tablets, or even Smart TVs.

All features — from cluster wins, Fat Symbol, and the two-phase bonus round to Feature Buy — work just as smoothly as on a desktop. No limitations — just you, the monsters, and a shot at up to 5,000x your bet.

Just head to Memocasino or any supported casino, launch the slot, and dive into the monster-filled world from anywhere: on the subway, in a queue, or cozy on the couch. The monsters are with you — even without an app!

Book of Monsters Casino: Gateway to the Monster Dungeon

Can you already hear the ominous rustle of pages and echoes of the underground? Then don’t wait — Memocasino is calling! This is where the portal to the Book of Monsters slot is wide open: the full version is available with all the features, bonuses, and of course — a chance to land an epic win.

But that’s not all — the welcome bonus at Memocasino feels like real magic: up to $450 on your first deposits and 250 free spins, which you can use on Pragmatic Play titles. It’s the perfect start if you want to immediately experience the power of the bonus rounds and watch the Fat Symbol grow in real battle!

Just register, fund your account — and go straight into the monster mayhem! Or, if you prefer to test the waters first — jump into the Book of Monsters demo, also available directly on the Memocasino site. No rush — test first, then play!

My Verdict: Is It Worth Opening the Book of Monsters by Pragmatic?

Without a doubt — YES! This slot doesn’t just grab attention — it leaves a mark. Book of Monsters is a rare example of how familiar mechanics can be wrapped in a truly original, captivating product. It screams style, lures you in with bonuses, and keeps you on edge until the very last spin.

You get a powerful combo: animated visuals worthy of a cartoon, the atmosphere of a dark fairy tale, bonus mechanics with player decisions, giant symbols, and gameplay that won’t let go. If you’re tired of cookie-cutter slots that reveal everything within 10 minutes — Book of Monsters is your breath of underground air.

Honestly, it wouldn’t be a bad idea to turn Book of Monsters into a standalone app — something like what they’ve done with Plinko or Aviator.

Rating: 9.5/10 — with a bold “must-play” label!