Book of Mystery

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Rules and Gameplay

The Book of Mystery slot by JDB168 transports players to the enigmatic world of Ancient Egypt, with a straightforward yet captivating 5×3 reel structure and 10 fixed paylines. Players can adjust their stakes from a minimum of $0.1 to a maximum of $0.5 per spin. The goal is to align symbols from left to right across any of the paylines, with automatic payouts triggered by winning combinations.

Bonus Features

This slot game enriches the player experience with several exciting bonus features. Each feature is designed to increase the potential for big wins:

  • Expanding Symbols – Random symbols may expand to fill entire reels during the Free Spins round, dramatically improving win potential.
  • Free Spins – Earned by landing three or more Book symbols, which act as scatters, this feature awards several free spins, allowing for cost-free wins.
  • Scatter Symbols – The Book symbols also serve as scatters, paying out and triggering Free Spins without needing to be on a payline.
  • Wild Symbols – The Book symbol doubles as a wild, substituting for all other symbols to form winning combinations, enhancing the likelihood of a payout.


Iconography in Book of Mystery is deeply rooted in its Egyptian theme, featuring a range of symbols from ancient lore:

  • Pharaoh Symbols – Represent the highest value symbols, offering substantial payouts.
  • Adventurers – These are mid-tier value symbols, depicting treasure seekers.
  • Scarabs and Ancient Artifacts – Lower value symbols that add thematic depth and frequent wins.
  • Book Symbol – Acts as both the wild and scatter, pivotal for triggering special features.


The payout structure in Book of Mystery is quite lucrative, with the game offering up to 5000 times the stake. Highlighted below are the payouts for matching symbols on active paylines:

Symbol Match 3 Match 4 Match 5
Pharaoh 100x 1000x 5000x
Adventurer 50x 400x 2000x
Scarab 30x 100x 750x


With 10 fixed paylines, Book of Mystery ensures that each spin has the potential to be a winning one. These paylines are non-adjustable, meaning each bet placed affects all 10 lines, maximizing the chances of hitting winning combinations with each spin.

Pros & Cons

Pros Cons
High RTP of 96.42% Limited betting range may not appeal to high rollers
Generous max win potential of x5000 stake No progressive jackpot
Engaging Ancient Egypt theme with well-designed symbols

Minimum and Maximum Bet

The Book of Mystery slot accommodates both novice and experienced players with a minimum bet limit of $0.1 and a maximum of $0.5 per spin. This range makes it an accessible game for those who prefer to play with lower risks.


About Provider

JDB168, the provider of Book of Mystery is renowned for developing engaging slot games with diverse themes and innovative gameplay mechanics. Known for their focus on mobile-first designs, JDB168 ensures that all their games, including Book of Mystery are optimized for seamless play on both desktop and mobile devices.

How To Play

Playing Book of Mystery is straightforward, follow these steps:

  • Step 1: Start by setting your bet size within the range of $0.1 to $0.5 per spin.
  • Step 2: Spin the reels by pressing the spin button and wait for the reels to stop.
  • Step 3: Check the paytable to understand the values of different symbols and possible winning combinations.
  • Step 4: Activate the Free Spins feature by landing three or more scatter symbols on the reels.
  • Step 5: Utilize the gamble feature if available, to multiply winnings by guessing colors or suits of cards.


Book of Mystery by JDB168 offers an enthralling slot experience with its well-executed Ancient Egypt theme and potential for high payouts. The game’s simplicity coupled with enticing features like Free Spins and Expanding Symbols makes it appealing for both new and seasoned players. While the game’s betting range might deter high rollers, its high RTP and the excitement of potentially winning up to 5000 times the stake provide plenty of appeal for a broad audience of casino enthusiasts.