| Casino Review May 2023
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Slot Book of Secrets — Game Review

Book of Secrets

Book of Secrets

Even slot machine games have their legends. If you’d ask the players around you about which slot machines they consider legends, the Book of Ra slot machine game would definitely make the list. Today, this classical piece although years after its publishing belongs among the best that you can wish for in the world of slot machines.

It’s no surprise that development studios are trying to create a similar game so they can harvest some of that popularity. We’ll take a look at one such game in this review. It is the doing of the masters from SYNOT Games and it’s called the Book of Secrets.

If it was just a simple copy of the Book of Ra we’d probably be frowning a lot. But the gentlemen from SYNOT Games did it very well. Although the graphics and theme are similar, the game mechanisms are different and most importantly, the main character is a woman. And not just any woman. But the beautiful archaeologist, Ivy, who will greatly delight the player’s eye. There’s definitively something to look at.

A sexy lady on the path to adventure

Basically, the Book of Secrets is a 5-reel online slot machine with three rows and 10 fixed betting lines. Just like with classical slot machine games the goal is to create a winning combination on the reels composed of identical symbols. In case of multiple winning combinations in the same line, the combination granting the largest winnings is the one that counts. In case of more winning combinations on multiple lines, the value of the winnings is summed up.

After every win, you can double it by using the special Gamble function. In it, you must decide the color of the card. If you guess the color correctly, you’ll be granted double of your winnings. But if you miss then you lose the entire winnings. You can also find the joker card. In which case you’ll be granted the same winnings as if you’d guessed the correct color.

Merged Wild and Scatter symbols

A curiosity of the Book of Secrets slot machine is the merged Wild and Scatter symbols. Usually, these symbols are separate. In this game, however, there’s only one symbol which also serves the function of a joker when it replaces the missing symbols in the incomplete winning combinations and also brings a bonus.

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If the symbol is displayed on the screen 3 or more times, you get 10 free spins. With them, however, another special function is related. Right after the free spins start, the machine determines one of the common symbols as the special expanding symbol. In case this symbol is then displayed at least on two reels, it expands to the whole reel and may then create additional winning combinations. Every time after the expansion, the machine evaluates the combinations of the special symbols and based on the number of them in the active line, ignoring whether they are neighboring, starting on the first reel from the left or not. Good news is that during the free spins you can get additional free spins.

Play the Book of Secrets slot machine for free first

The final rating from us is positive. The new machine from SYNOT Games surpassed our expectations. And even though thanks to the main hero, we’ve squinted our eyes from time to time, you’ll definitely have fun with it. You can play the Book of Secrets slot machine completely for free and try out if a young lady can seduce you as easily as she seduced us. If so, then most certainly try winning something for money. We’ll have our fingers crossed.

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Book of Secrets Slot Review

Book of Secrets

The Book of Secrets slot by Synot is a high variance 5×3 reel 10 payline game with a wild that acts as a scatter and triggers 10 free spins with an expanding scatter pay symbol on every spin.

Now, just because it’s not original doesn’t mean we’ve taken away the star rating. But if you are going to do a copy, make sure it’s a better one, or at least as good as the original.

And whilst the slot theme of the adventurer lady wearing her fedora and heading into an Ancient Egyptian tomb is well done, it’s not quite enough to bring a thrill to your spins.

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The Book of Secrets slot has an RTP of 94.11%

And that’s very low. The RTP of a slot machine basically dictates how much of the money it will pay out over its lifetime. You want the RTP to be set around 96%, 95% at the lowest.

But here, you can play on the Book of Fallen slot (RTP 96.5%) or the Book of Toro (RTP 95%), or even the Book of the East (RTP 96.18%) for a lot more returns with almost identical mechanics.

It still has all the highlights of a great slot

We had to give this Book of Secrets online slot review 2 stars because at heart it still had all those great features.

You do get a wild symbol that also acts as a scatter. You do get a free spin bonus where one symbol will be chosen to pay as an expanding scatter pay. It does give you the chance to win on all 10 paylines at once and the top win of 5,000x your bet.

We just don’t want this to be the first ‘Book of’ slot that you try, and then get frustrated and hate them all. There are simply better versions of this video slot online.

But if you are a fan of the genre, and just like more of the same, this Book of Secrets slot machine is solid enough that you may get lucky.


  • Book of Secrets Mobile Slot Game
  • Book of Secrets Slot Free Spins Win
  • Book of Secrets Slot Expanding Symbols

Book of Secrets slot stats

Mobile Slot releasedMarch 2022
Slot typeVideo Slot
Slot reels / paylines5 Reels / 10 Paylines
House edge / RTP5.89% / 94.11%
Slot volatilityHigh
Min/Max bet0.10 / 200
Free spins10 Free Spins / Expanding Scatter Pay Symbol
Bonus roundsFree Spins, Expanding Scatters, Wild Scatter
Slot ThemesAdventure & Explorer

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In-game bonus features

Wild Scatters: The Book is the wild symbol and replaces all other symbols on the reels to create a win. It is also the scatter and triggers the bonus game.

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Scatters and Free Spins: 3 scatters trigger 10 free spins where one symbol will be chosen to act as an expanding scatter pay. This symbol will now expand to cover the whole reel and pay like a scatter on all 10 paylines.

You can re-trigger the free spins with 3 wild symbols on the screen.

Gamble Feature: You can gamble any of your wins in a simple card game. Guess the next colour card in the deck correctly and you’ll get double your original win amount. Guess wrong, and you lose the whole win.

Book of Secrets Review Conclusion

This is almost playable, which is why we gave this Book of Secrets slot review 2 stars.

It has all the hallmarks of a great ‘Book of’ slot game thanks to 5 reels and 10 paylines, that wild scatter, and the expanding scatter pay symbol in the free spin bonus round. We can’t fault it there.

It’s such a shame that the RTP is set at such a low 94.11%, however, as there are so many other slots of this type that do the exact same thing, but that pay out more to players.

The Book of Dead online slot, Book of 1001 Nights game, Book of Oz by Microgaming even. Any of these provide you with similar fun but better odds of winning.

Book of Secrets has all the right ingredients, but the cake is still just a little too sour for our taste.

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Review by Lucky Mobile Slots , last updated: March 29, 2022 — Rating 2

Book of Secrets Slot Review

Book of Secrets

Book of Secrets is a five-reel and three-row video slot, which is plucked from the gaming suite of Synot and adopts an Ancient Egyptian theme. The title fits the experience players will be offered because they will be taken on a wild reel adventure within an ancient temple where the ten fixed win lines are positioned.

The software provider strives to keep players thrilled and entertained, and to attain this, has equipped Book of Secrets with a good range of bonus functionalities. There are randomly-picked and expanding symbols that will come to the aid of players to make their betting session far more rewarding.

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The spinning action in Book of Secrets gets underway for wagers ranging between $0.10 and $80.

Book of Secrets Slot Summary
Payline Number10 non-adjustable paylines
Minimum Bet$0.10
Maximum Bet$80
Wild SymbolsThe book of secrets awards a payout and can stand instead of all other icons
Scatter SymbolsWhen at least three books of secrets scatter symbols arrive, they will activate the rounds of free spins
Bonus FeaturesFree spins with randomly-selected special icons and a gamble feature

Symbols and Winning Combinations of Book of Secrets Slot

Book of Secrets allows players to explore the tomb of the pharaoh and get exceptionally close to his immense riches. The game window is placed right on the entrance of the tomb, and reel spinners will see that it is flanked by two statues, while above it, they will spot multiple hieroglyphs. The game engine is made of stone blocks, and its casing, together with the logo are made of gold.

There is also mysterious background audio, which perfectly fits the Ancient Egyptian reel adventure. While the game sets the scene, reel spinners will get to see multiple icons that have to do with the Egyptian topic, including a pretty archeologist. Being the most rewarding from the regular-paying icons, the archeologist brings wins of 500x the staked amount when it appears five times during the same round.

The mask of Tutankhamon is the second most valuable icon in Book of Secrets, and the prizes it generates are worth up to 200x the staked amount. The payscale of this video slot features multiple familiar Egyptian icons as the last two from the high-value ordinary icons are the scarab beetle and the ankh. Both icons award prizes of 75x the preferred bet value if they hit the screen five times during the same round.

The icons that are included in the paytable of this video slot are a total of ten, and five of them are represented by the ordinary set of card faces 10 through A. Getting five-of-a-kind of these symbols will invariably result in a payoff of 15x the staked amount. Unlike the high-ranking icons that pay even if they land just two times on the reels, the low-payers should enter at least three positions to bring a payoff.

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Bonus Features of Book of Secrets Slot

Considering that the book of dead keeps the secrets of how to bring kings back to life, it is therefore not surprising that this is the most powerful icon in the game.

The book of secrets is the most powerful of all icons available in the game and has dual purposes as it acts like a wild and scatter symbol at the same time. Getting two, three, or four examples of it will mean that reel spinners will collect a payout of x2, x20, or x200 the preferred bet amount.

In addition to the healthy prize, getting at least three books scatter symbols will mean that players can benefit from an entry in ten rounds of free spins. Before they enter the free rounds, players will be presented with the special icon, which will be chosen for the duration of the bonus game. The free spins functionality can be retriggered, and if this comes about, the special symbol will remain the same.

Both, the high-value and low-payers can be chosen to act as a special icon upon the activation of the free spins functionality. When a winning combo is formed, and players have collected their prize, the special icon will expand, thus awarding a prize on its own. This will occur, no matter the position on which the special icon has popped up. Yet, reel spinners should know that the special icon will only expand if a winning combo can be completed.

While availing themselves in Book of Secrets, players will be allowed to gamble any win they score. They can do so during a card-based risk game, in which they can increase their prizes further or walk empty-handed.


Book of Secrets is a game, which is tailor-made for players who enjoy Ancient Egyptian reel adventures. It boasts a slick design, while the visuals are pin-sharp, which makes this video slot worth giving a spin. Besides, players will have the chance to rack up some bountiful rewards once they enter the rounds of free spins and the special bonus icon comes into view.

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