Introduction to Book of Monsters
It might sound like light reading from a magical school like Hogwarts, but Pragmatic Play’s Book of Monsters is far from typical. This isn’t your usual ‘Book of’ game, where symbols expand across the reels. Instead, it’s a cluster-paying grid slot with a unique twist. The game uses a 7×7 grid, creating winning combinations when at least five matching symbols are adjacent either vertically or horizontally. While it shares some features with other games, it offers a luckycola fresh experience that’s both engaging and rewarding.
The Monsters of the Game
At first glance, the monsters in Book of Monsters might seem a little harmless. Unlike the usual terrifying monsters you’d expect, these are more playful and mischievous in nature, reminiscent of the Reactoonz style. With wide eyes and toothy grins, they give off a fun vibe rather than a scary one. Set against a dark, cave-like backdrop, these monsters thrive in a glowing blue ambiance, shifting to an orange hue when free spins are triggered. The vibe is certainly more playful than terrifying, making it a unique take on the monster theme.
Cluster Pays and Gameplay Mechanics
One of the standout features of this game is its cluster pays system. Players need to land at least five matching symbols adjacent to each other to win. It’s a refreshing change from traditional paylines and offers more dynamic ways to hit winning combinations. The base game might not have many exciting features, but the potential for big wins lies within the bonus round, where the real excitement begins. In fact, it’s during the bonus round that Book of Monsters reveals its full potential.
Base Game and Ante Bet Feature
The base game of Book of Monsters can be a little underwhelming without any features, but that’s where the ante bet comes in. Players can activate this feature to increase the likelihood of triggering free spins by 7 times. While the base game has bets ranging from 20 c to $/€240, activating the ante bet doubles the stake. This might not add more features, but it certainly increases the chance of reaching the bonus round where the real action happens. With a high volatility and a luckycola top RTP of 96.5%, players can expect an exciting and potentially rewarding experience.
Symbol Value and Fat Symbols
The symbols in Book of Monsters are a mix of card ranks and quirky monster designs. The low-pay symbols feature classic card ranks, such as Jack, Queen, King, and Ace, while the higher-paying symbols include purple, green, and red monsters. The real magic happens when Fat symbols come into play. These symbols can appear as 3×3, 4×4, 5×5, 6×6, or even 7×7 in size, creating massive potential for big wins. Fat symbols can randomly land on the grid in the base game and provide larger luckycola clusters for higher rewards.

Free Spins and the Fat Symbol Gambler
Free spins are where things really start to get interesting in Book of Monsters. Landing 4 or more scatter symbols in the base game awards 5 to 8 free spins. If the ante bet is active, the number of scatters required is reduced, giving players a higher chance of triggering the bonus round. Once the free spins are activated, a random symbol is chosen as the Fat symbol, which will grow throughout the bonus round. Players also have the opportunity to gamble for a better Fat symbol or additional free spins, adding an extra layer of excitement to the game.
Progressive Fat Symbol Feature
During the free spins, a progressive feature adds a sense of anticipation. The Fat symbol, which starts as a 1×1 symbol, will move to a new position after each spin. As more matching symbols land on the grid, the Fat symbol grows in size. This can lead to bigger wins as the symbol expands from 1×1 all the way up to 7×7, depending on how many symbols are collected. Each time the Fat symbol increases in size, additional free spins are awarded, making the feature even more rewarding. If you’re looking for huge wins, this is where the game really shines.
Bonus Buy Feature
For players who are eager to skip the base game and dive straight into the action, Book of Monsters offers a Bonus Buy option. This feature allows players to buy into the free spins bonus for 100 times their stake. When the bonus is bought, 4, 5, 6, or 7 scatter symbols will randomly land to trigger luckycola the free spins. This is an excellent option for those who prefer to go straight to the fun without waiting for the bonus to trigger naturally.
RTP and Volatility
Book of Monsters comes with a high level of volatility, which means that big wins are less frequent but can be substantial when they do occur. The game’s RTP is set at 96.5%, which is fairly high for a slot of this type. With the chance to win up to 5,000x your stake for a massive 49-of-a-kind cluster, this game certainly has the potential to deliver significant payouts. Keep in mind that high volatility slots can result in long dry spells between wins, but the thrill of hitting those big clusters makes it worth the wait.
Final Verdict: Is Book of Monsters Worth Playing?
After playing Book of Monsters, it’s clear that it doesn’t follow the traditional ‘Book of’ slot format, but that doesn’t mean it’s any less fun. The unique gameplay mechanics, coupled with the progressive Fat symbol and free spins features, make this game stand out from the crowd. If you’re a fan of cluster-paying slots and enjoy high volatility, this game is definitely worth checking out. And with the added option of the Bonus Buy feature, you can dive straight into the action without delay. For players luckycola who enjoy a bit of mischief with their monsters, this one is sure to entertain!
