Book of Monsters Slot Review
Book of Monsters is a New Slot recently released by Pragmatic Play. It boasts a creative duo of features that are undoubtedly a powerful tandem in terms of potential profit. These functions are the Cluster Pays mechanics and Fat symbols. Furthermore, free spins, which are always in high demand, are in place. By the way, it is a Mobile Slot, too. Hence, you can indulge in it whenever you want, regardless of whether a PC is nearby.
Book of Monsters by Pragmatic Play Slot Features
Book of Monsters Play Free Demo
By the way, there is a nice chance to try this stunning game out, thanks to the training mode that the Book of Monsters is equipped with. It implies playing with fake currency, which never ends. It's only required that the game page be refreshed to refill the balance once it is exhausted. So, this way of entertainment opens unlimited opportunities for those targeted to learn the slot, reveal its prize potential, or invent the best-working winning strategy. You can play the Free Slot on this page. Furthermore, we recommend a robust Real Money Casino to those ready to play this game with cash.
Book of Monsters Bonus Features
This High-Volatility Slot boasts a big 7x7-sized playfield. Furthermore, it’s a Cluster Pays Slot. Let’s learn how exactly Cluster Pays mechanics work.
Cluster pays
This payment mechanic works like this: at least 5-of-a-kind paying symbols bring a payout if they form a cluster by connecting each other horizontally or vertically.
Fat Symbols
These are in play within the base and bonus game and can be of the following sizes—2x2, 3x3, 4x4, 5x5, 6x6, and 7x7. During the primary mode, the minimum Fat symbol’s size is 3x3. In the base mode, the Fat symbol appears in random rounds, whereas within Free Spins, a single Fat symbol is always on the screen.
Bonus Symbol
These trigger the bonus game, featuring Free Spins:
Number of Bonus symbols |
Number of starting FS |
4 |
5 |
5 |
6 |
6 |
7 |
7 |
8 |
Bonus symbols also pay, yielding up to x100 for a 7-symbol winning cluster.
Free Spins (FS)
Once a bonus FS game has started, a random paying symbol is chosen to be the Fat one during FS.
Gamble round
Yet, the most risky players can try to get a higher-valued paying symbol as a Fat one instead of that chosen automatically. The chances of success are always showcased in percentage. The higher the number of free spins or the higher the value of the paying symbol you want to nab, the lower the odds of winning. The maximum number of initial Free Spins one can get this way is limited to 8 FS. Of course, you can also lose a chance to play Free Spins in this case, as any try can lead to failure.
Gameplay
The chosen Fat symbol is always on the screen, roaming onto random positions with each new round. Initially, its size is 1x1. Yet, the Fat symbol can gradually grow due to a special meter collecting images that are identical to the Fat symbol:
Symbols’ number to collect |
The size of the Fat symbol |
30 |
2x2 |
27 |
3x3 |
24 |
4x4 |
20 |
5x5 |
16 |
6x6 |
12 |
7x7 |
As you can see, the bigger the Fat symbol, the simpler it is to grow further. Moreover, each time the Fat symbol gets more extensive, a random number of FS is awarded (1, 2, or 3).
Buy Free Spins
Luckily for you, it is a ‘Bonus Buy’ slot, which allows you to prompt Free Spins at any moment for the price of x100 by the current bet. However, the number of Bonus symbols triggering a bonus FS game will be random (4, 5, 6, or 7).
Ante Bet
Additionally, one can pile on their chances to activate FS by enabling the ‘Ante Bet’ option. This feature doubles your stake, yet wins are paid as if the bet is still the same. Yet, this function 7 times increases the odds of getting a bonus FS game triggering.
Our Experience Playing Book of Monsters
We’ve experienced a 300-spin playing session to understand how engaging and fruitful this slot is regarding great wins. Our starting deposit totaled €200, whereas the stake per round was €1. Finally, it was the Best RTP Slot (96.5).
Sadly, the first hundred spins didn’t reward us with bonus FS game triggering. Yet, we got 21 regular wins, from €0.2 to €25.2. By the way, only nine cash prizes were lower than €1 (our current stake). As a result, after the 100th spin was out, we possessed the €162.8 amount.
The following hundred spins also didn’t please us with a Free Spins activation. Instead, we reaped 23 base game rewards, ranging from €0.2 to €40. A few big wins amounted to x20, x20, and x15 to the bet. This time, only seven cash prizes appeared lower than €1. And when these hundred spins went out, our game balance was €197.15.
Fortunately, the 3rd hundred spins finally presented us with Free Spins that earned the giant sum of €406.8. That became possible due to a pair of fortunate circumstances. First, we got the highest-paying symbol chosen as the Fat symbol. Second, the Fat symbol eventually grew up to the 5x5 size. The regular prizes totaled 28, including 12 less than the stake. Also, we got three relatively large win strikes—all were x15 by the bet. We eventually possessed as much as €589.6 when the game was over. Therefore, we won precisely €389.6. Nice!
Book of Monsters Verdict
To sum up, many wins were over the current stake, which is beneficial since it allows for a refill of the game balance, even when the bonus FS game triggers infrequently. Free spins were not frequently activated, yet even a single bonus game activation has contributed much money. Frankly, it is a classic high-volatility slot-playing scenario when you must patiently await a mouthwatering prize. Of course, besides patience, you also require a bulk wad of banknotes to play this game long enough to wait for a decent reward. So, for casual punters, this playing title may seem far too volatile.
Concluding this Slot Review, it is left to summarize that the primary mode contributes its portion of thrill, thanks to numerous big wins (we got eight x10–x40 wins per 300 spins). The bonus FS game supplies a Fat symbol that quickly grows and delivers extra Free Spins, providing solid cash prizes growing parallel to the Fat symbol's size. The Fat symbol reached the 5x5 size in our case. Overall, it is a fun and thrilling game that can bring you stunning prizes during the bonus game and base one. The only challenge here is to await the bonus FS game triggering to get a real chance to snag a small fortune.
Symbols and Paytable








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