Book of 99 Slots
Why is everyone talking about the Book of 99? It’s not just the epic Greek Mythology theme or the massive payout potential. The secret is right in the name: a stunning 99% Return-to-Player (RTP). This isn't just a number; it's a statement from Relax Gaming, giving you one of the best theoretical payback rates available anywhere online. Every spin carries more weight, knowing the game is designed to return more to the player community over time.
Your Path to Power: Two Bonus Rounds
Book of 99 doubles down on its rewards with two distinct bonus mechanics. The first is the classic Free Spins feature you'd expect from a 'Book' game. Land three or more Book of 99 symbols, which act as both Wild and Scatter, to secure 10 free games. Before the round begins, a special expanding symbol is chosen. When this symbol lands during the feature, it expands to cover the entire reel, paying out on all 10 paylines regardless of position. Landing a high-value character like the Man or Woman as your special symbol can lead to screen-filling wins.
The second path is the Collection Feature. Every time a Book wild symbol lands on the 5-reels during base gameplay, it adds to a meter on the side of the screen. Fill the meter by collecting 99 Books, and you automatically trigger the 10 free spins. This provides a tangible sense of progression and a guaranteed bonus for your loyalty, a fantastic addition that sets it apart from other video slots.
Meet the Gods and Monsters
The paytable is a who's who of ancient legends. The highest paying symbols are the determined Man and the powerful Woman, followed by the monstrous Lamia and the one-eyed Cyclops. Even the lower-value card symbols (A, K, Q, J, 10) are designed with a classic Greek flair, keeping you immersed in the adventure. The Book of 99 symbol is your most valuable asset, substituting for any other symbol to complete winning lines and triggering the main bonus round.
Limited-Time Boost: Get 50 Extra Spins!
Ready to challenge the pantheon? We're making it even more rewarding. This week only, make a qualifying deposit to play Book of 99 and we'll instantly credit your account with 50 Bonus Spins. This is your chance to fill that collection meter or land the free spins feature with a serious head start. Check our bonuses page for the full details before this offer vanishes.
With its phenomenal 99% RTP, dual-feature system, and engaging presentation, Book of 99 isn't just another slot game; it's a new standard for player value. The combination of the collection mechanic and the traditional bonus provides a balanced experience where big wins feel constantly within reach.