Book of 99

Book of 99

Book of 99 is the unique slot game featuring an exciting Collection Meter, giving you the chance to trigger Free Spins and potentially win up to 5,000x your bet!

    Book of 99 Game Overview

    The bet sizes available in Book of 99 range from 10p to £50.  

    Betting in this game is fixed at 10 paylines. 


    Every Wild that appears during the main game will be collected.

    The collection meter starts at zero and can reach a maximum of 99.

    For every Wild collected, the meter increases by one.

    Once you've filled the meter with 99 Wilds and activated Free Spins, the collection meter will reset to zero.

    Any Wilds collected over 99 will carry over once the meter has reset (e.g. if 101 Wilds have been collected, the meter will reset to two).

    Should three Wilds land at the same time as a collection is completed, the triggering Wild will be played first followed by Free Spins.

    The average bet size must be an integer multiple of the minimum bet - if it's not, it will be rounded according to the rules of stochastic rounding.

     Malfunction voids all pays and plays throughout this game.

    Free Spins

    Free Spins can be triggered two ways:

    • Land three or more Wild symbols anywhere on the reels (the bet size used will be the same as the triggering spin)
    • Collect enough Wilds to complete the collection (the bet size used will be the weighted average of the bet sizes used when collecting each Wild)

    Regardless of how Free Spins is triggered, you'll win 10 free spins. 

    At the start of the round, one regular symbol will be randomly selected to be the special symbol for the duration of Free Spins. 

    At the end of each spin, once normal wins have paid out, special symbols will expand to cover the whole reel if there are enough special symbols present (two for high-paying symbols; three for low-paying symbols).

    Expanding special symbols pay out for all 10 lines, regardless of their horizontal position, according to the number of symbols and corresponding paytable value. 

    Existing Wild symbols are not included in the expanded special symbol payout.

    Re-trigger Free Spins by landing another three or more Wilds during the feature.

    This will award you 10 more spins.

    Return to Player 

    Return to Player (RTP): 99.00%.

    The expected return is the amount we pay out to players relative to the amount of wagering on the game. 

    For example, if we take £100 of wagers we will, on average, pay out £99.00 of wins.