Book of Monsters Slot Overview
Book of Monsters is a casino slot from Pragmatic Play that transports players to a mysterious dimension inhabited by quirky creatures. They are troubled little beings that can't control their own growth and can randomly balloon up to seven times their original size, making it challenging to navigate the narrow caves and crevices of their rocky environment. At the heart of their community is a magical book that's the source of all that craziness. Whichever monster shows on its pages will randomly start growing until it reaches the designated dimensions.
While it might be a daunting moment for the monsters, it's all favorable for the players who'll benefit from the creatures' size on a 7x7 grid, where symbols must form into clusters of 5 or more. Also, during the bonus round, the book will select one paying icon to act as a so-called Fat Symbol, which will be able to grow progressively throughout free spins. Should it achieve its maximum size covering the entire grid with a handful of rounds still remaining, the chance of arriving at the top prize 5,000x the bet should be entirely within reach!
Book of Monsters is a video slot from Pragmatic Play with 7 reels, 7 rows, and a cluster-pays win system requiring at least 5 symbols connected vertically and/or horizontally. Players can choose their stake from a range of options, starting from a Min.bet of 0.2 up to a Max.bet of 240. The game offers a default RTP of 96.50%, although two lower variants of 95.50% and 94.50% are also available for operators. Players will experience high volatility, with a max win capped at 5,000x the bet. The probability of winning the top prize is, on average, 1 in 547,945 spins, while the bonus game triggers at a rate of 1 in 291 spins.
There's not much known about the mysterious realm where the monsters reside, so one must explore with caution and ideally with a few reliable features on hand. The features of Book of Monsters are Fat Symbols, Free Spins, Ante Bet, and Feature Buy.
Book of Monsters Slot Information
Our journey to the monsters' world begins and ends somewhere under the surface in a magical cave. While the creatures on the reels look quite harmless and friendly, the ones looming from the dark rocky crannies feel a bit scary with their ominous grins and flashing eyes. The inside of the hollow is bathed in soft blue light that pulsates with unknown energy. To the right of the grid, the titular book floats above a stone pedestal in a constant vent of steam, ready to reveal its next "victim". In the middle of the view, the playing panel stands firmly, surrounded by an irregular stone frame. Symbols landing on it must connect into clusters of at least 5 by touching each other vertically and/or horizontally. Players can transport themselves to the mysterious cave by using any modern digital device, whether it's a desktop, a smartphone, or a tablet.
Among the low-value symbols, we recognize the traditional royal letters from playing cards, J, Q, K, and A, awarding between 100x and 200x the bet for combining 49 instances in a cluster. The high-value ones are depicted by a purple, green, and red monster. Prizes for matching 49 identical premium symbols in a cluster range from 250x to 5,000x the bet. In addition to regular icons, there's also a Bonus Symbol represented by a gazing orange eyeball that will open the way to the free spins bonus.
Book of Monsters Slot Features
What is the max win in the slot Book of Monsters?
You can win up to 5,000x the bet.
What features are available in the slot Book of Monsters?
The features are Fat Symbols, Free Spins, Ante Bet, and Feature Buy.
Fat Symbols
At random during the base game, the book may open and reveal one of the symbols from the paytable that will appear in the size of 3x3, 4x4, 5x5, 6x6, or 7x7.
Free Spins
Landing 3, 4, 5, 6, or 7 Bonus symbols at the same time awards a payout of 5x, 15x, 50x, or 100x the bet and activates a round comprising 5, 6, 7, or 8 free spins, respectively. Scoring only 2 Bonus symbols pays 2x the bet, without triggering the bonus.
Before the game begins, the book chooses one paying symbol to act as Fat Symbol throughout the bonus. Players can also gamble their starting conditions of the game at the risk of losing the bonus entirely. Two separate options will allow them to increase the number of spins and improve the Fat Symbol to the next one in the hierarchy. Each choice comes with a calculated percentage that determines the chance of success. Whenever the book displays a "The End" message after the gamble, the bonus will be lost, and the game will go back to the main stage.
Once free spins begin, the Fat Symbol is 1x1 in size and moves to a random position on every spin. Collecting symbols matching the Fat Symbol increases its size and awards between 1 and 3 extra spins whenever it happens.
30 symbols collected = Fat symbol increases to 2x2
27 additional symbols collected = Fat symbol increases to 3x3
24 additional symbols collected = Fat symbol increases to 4x4
20 additional symbols collected = Fat symbol increases to 5x5
16 additional symbols collected = Fat symbol increases to 6x6
12 additional symbols collected = Fat symbol increases to 7x7
Ante Bet
Players can boost their chances of triggering the bonus seven-fold by activating the Ante Bet feature, which increases the active stake by 100%.
Feature Buy
For those who prefer to skip the grind and dive straight into the bonus, the game offers such a possibility for a price of 100x the bet.
Book of Monsters Slot Conclusion
If you thought this would be another generic 5x3 with Expanding Symbols in the bonus, Pragmatic Play got you, just like it did us. We won't lie; seeing a 7x7 cluster slot called "Book of" took us by surprise. Perhaps not a massive one like a few dozen people jumping out of the dark to greet you at your secretly prepared birthday party, but still. The first look at Book of Monsters is a pleasant and comfortable one. It has a touch of some other monster-themed slots released by the provider in the past, like Monster Superlanche, for example, but otherwise, it comes with its own playful style. There's plenty of detail weaved into the surroundings, which makes the entire scene lively and full, so to speak. Compared to some rushed roadmap fillers that we get to see regularly roll off the Pragmatic's assembly line, this one seems to have received much more love and attention from the artists.
On the technical side, the game highlights a single feature that allows regular symbols to land in larger sizes, up to 7x7. At the time of writing this review, many studios have experimented with the concept, from Gigablox reigning in the Yggdrasil network to Big Symbols regularly appearing in ELK Studios' productions like Valhall Gold. However, seeing them in a cluster-based setup feels much more geared toward the player. The bonus round resembles what you may have seen in Fat Rabbit by Push Gaming and its later follow-ups, a roaming symbol that grows in size once the collection thresholds are met. It may feel a little less attractive since the selected symbols are only the regular ones while the insatiable bunny always acted as a Wild. Still, given the larger grid size and the fact that the top-paying symbol awards 5,000x for a blackout event, there are reasons to give it a go. Especially since the top prize probability comes at a massively attractive rate of 1 in 547,945 spins on average.
Book of Monsters competently fiddles around with colossal symbols and their progressive growth to provide streamlined yet potent gameplay.
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