SYNOT Games takes players on an ancient Egyptian adventure with its latest archeological slot release, Book of Secrets Extra.


Out now




Book of Secrets Extra is a 5×3 reel, 10-payline slot with a maximum win of up to x500 the player’s stake.




85.11 – 97.93 per cent 


Low value symbols come in the form of the high end of a deck of cards, with 10 through to Ace. These symbols can offer between x0.5 and x15 the player’s stake, depending on the amount of matching combinations that land on a single spin.

Egyptian artefacts depict the medium value symbols, using red staffs, green scarabs and golden pharaoh heads. If the right amount of winning combinations land at once then these symbols can offer between x0.5 and x200.

The Book of Secrets female explorer represents the highest-paying symbol, offering between x1 and x500 the player’s preferred bet.

Finally, book scatters, that also work as wilds, can drop onto the reels. These books trigger 10 free spins if three or more land at once and substitute for all other symbols.

These scatters can also offer a payout between x2 and x200, depending on how many scatters land on a winning payline.


During the free spins feature, a random symbol can be selected to become a special symbol for the duration of the bonus game mode. Only the book scatter cannot be chosen as this special symbol. 

After a regular payout from a free spin, the special symbol can expand to cover more of the reel set to potentially award a higher payout. 

These expanding symbols will only occur where a win can be formed using the chosen symbol. 

Players have the opportunity to gamble all, or half, of their winnings after every payout in a 50/50 card select. 

If players can correctly guess whether a random player card will be black or red, they will double their stake. Guessing incorrectly will cause players to lose their gambled winnings. 


Matej Sopoci, Chief Product Officer at SYNOT Games, commented: “We are bringing back the successful ‘Book of’ concept extended by improved free Spins and the buy feature. We’re delighted to introduce our renewed product with an update which will hopefully bring many entertaining moments to our customers and partners.”