Book of 99 Slot Review, Demo Play, Payout, Free Spins & Bonuses

Book of 99 Review

The journey home from the Trojan War was far from smooth sailing for Odysseus. It lasted 10 long years, and the brave warrior-king encountered numerous challenges. These included being captivated by the one-eyed Cyclops, as well as being tied to the mast to avoid the luring appeal of the dangerous Sirens. All the while, his ever-faithful queen and wife, Penelope, had her hands full fending off hundreds of suitors hungry for the throne.

It seems that Relax Gaming is hungry for another kind of throne, namely the ‘Book of’ throne. Their courtship to players comes in the form of an alluring 99 % theoretical returns, but the keyword here is ‘theoretical’. There’s no denying that this is an attractive and record-breaking stat, but the volatile nature of this game can still drain your bankroll to zero in the short run. Combined with the Book Collection feature, distinct visuals, and a compelling backstory, Book of 99 is undoubtedly up there as a very solid challenger.

Relax Gaming - Slot Developer

Relax Gaming, a seasoned veteran in the iGaming industry since 2010, consistently delivers high-quality, visually stunning slot games.

Licensed in Malta, Alderney, and the UK, Relax boasts an impressive portfolio of over 150 games, including 147 captivating video slots. Their Dream Drop jackpot system adds another layer of excitement to many of their games, offering players the chance to win life-altering payouts.

Slot Theme And Storyline

Book of 99 slot offers a thrilling journey through Homer's Odyssey. The game's storyline unfolds as you collect book wild/scatters, symbolizing Odysseus's quest to return to his beloved hometown Ithaca. You’ll encounter fearsome creatures like Pythia, Polyphemus, and Lamia while navigating a classic Greek temple grid. This game weaves an epic narrative, and it offers unmatched theoretical returns in the long run.

Book of 99 Slot Reel Screen

Book of 99 RTP, Volatility, And Max Win

The Book of 99 RTP of 99 % is among the highest theoretical returns you’ll find, and it’s significantly above the industry average of 95-96 %.

This is a high volatility installment from Relax Gaming, scoring 5 out of 5 on their own volatility scale. The Book of 99 max win is 12,075x your stake, which is above average even for this volatility level.

Book of 99 Rules And Gameplay

You can play with bet levels between €0.1 and €100 per spin in Book of 99 slot, which caters to all types of players. The game plays out on 5 reels, 3 rows, and 10 paylines, which is standard for ‘book of’ slots. You win by landing 2+ matching symbols across at least one payline for the premiums, and 3+ for the royals, and winning combos start from the leftmost reel towards the right. The Book Wild substitutes for any pay symbol to help complete or improve line wins, and it’s also the bonus round-triggering scatter symbol.

Symbols And Paytable

Symbols	Bet Multiplier Values
Apollo	2, 3, 4, or 5 = 1x, 10x, 100x, or 500x
Pythia	2, 3, 4, or 5 = 0.5x, 4x, 40x, or 200x
Polyphemus, Lamia	2, 3, 4, or 5 = 0.5x, 3x, 10x, or 75x
A, K	3, 4, or 5 = 0.5x, 4x, or 15x
Q, J, 10	3, 4, or 5 = 0.5x, 2.5x, or 10x
Book Wild/Scatter	Substitutes + triggers Free Spins

Book of 99 Bonuses And Special Features

Book of 99 slot follows the familiar 'book of' slot formula, but introduces a unique twist to the bonus round triggering mechanism via the book collection system. Let’s check it all out!

Book Scatter/Wild Collection Meter

The Book Collection feature is one thing that makes this game stand out, and the book serves double duty as both the wild and the scatter symbol, per usual. As a wild, the book steps in for all regular pay symbols to help you form winning combos, and each book you land is also collected in the meter on the left-hand side.

The Wild Collection Meter is inspired by Homer (no, not the goofy Simpson character) and his famous Odyssey. Just like the classic dactylic hexameter poem, the meter depicts the Greek war hero and King of Ithaca, Odysseus, on his dangerous voyage home from the Trojan War (also depicted by Homer in his equally famous Iliad).

Anyway, history lesson aside, Odysseus' ship moves 1 step closer to home for each book wild you collect, and you need to collect - you guessed it - 99 wilds to fill the meter and reunite the brave King with his very patient wife, Penelope.

This awards you the bonus round, and it plays out exactly like if you trigger it by landing 3+ book scatters on the same spin.

Book of 99 Free Spins

Landing more than 3 book symbols makes no difference in this game, as there is no scatter win involved. You trigger the Bonus Round with 10 free spins either way, and the Book opens up to a random page to reveal which symbol becomes the special expanding symbol during the bonus round.

If 1 of the 4 character symbols gets chosen, you need a minimum of 2 anywhere to trigger the expanding symbol feature. The low-value royal symbols require a minimum of 3 symbols to expand. All instances of the chosen symbol expand after the regular win calculation, and they don’t need to land adjacent to generate a win. You can retrigger the feature by landing 3+ scatters on the same free spin.

Book of 99 Demo Version And Free Play

Set sail on your epic journey to riches with the free Book of 99 demo before playing for real. This gives you a chance to experience the thrill of the high RTP level, and perhaps come to terms with the fact that even a 99 % RTP doesn't guarantee a constant stream of winnings.

It’s a great way to chart your course for when you're ready to play for real rewards, and then you’ll find our selection of recommended casinos below the demo game.

Play Book of 99 Slot On Your Mobile

Certainly, you can embark on your Book of 99 game odyssey even on your mobile phone, and the game adapts seamlessly to any handheld device. Tablets are equally suitable vessels for your journey, with both Android and iOS devices performing smoothly. No mobile app is needed, as you simply set sail directly in your mobile browser. Test the free Book of 99 demo on your preferred mobile device to get a taste of the adventure that awaits at our mobile-friendly casinos.

Strategy And Tips For Winning

To enhance your journey towards the untold riches of Ithaca, consider raising your stake when you feel the bonus round is just over the horizon. This may lead to grander rewards in the feature, akin to treasures hidden in Polyphemus' cave. But be wary not to let this strategy lead you astray, like Odysseus tempted by the sirens' call. It can prove costly if you become too consumed by the chase, forgetting the true goal of your journey.

The 200 Spins Book of 99 Online Slot Experience

After some smaller wild wins, we landed a bigger one not long before we triggered the bonus round with 3 book scatters.

This happens at 1:35 into the 3-minute highlights video, and if you pause the video you can actually read passages from Homer’s Odyssey in the book, which is kind of cool. To see how we fared, simply hit the play button below.

Pros And Cons Of Book of 99 Online Slot

Pros

• 99 % RTP is almost unheard of
• Collect 99 books to trigger the bonus round
• Bonus round w/ chosen expanding symbol
• (can also be triggered the regular way)
• Win up to 5,000x your stake

Cons

• Keep in mind that 99 % is in the very long run

How To Play Book of 99 At An Online Casino

If you've already conquered the free Book of 99 demo, it's time to set sail for real money treasures at one of our recommended casinos. Follow these steps to claim your welcome bonus today and get started in no time:

• Hit this link to find a confirmed Book of 99 casino at the top of this page (below the demo game).
• Sign up with your chosen casino and deposit money to claim your bonus.
• Visit the game lobby and search for Book of 99.

Similar Slots To Try

Mega Joker - is the only other well-known slot out there featuring a 99 % RTP. Granted, you have to play with the highest possible stake to benefit from such insane returns, and you can win up to 2,000x your stake in the classic 3-reelers’ famous Supermeter Mode.

Book of Sun: Choice - is the highest RTP alternative to Book of 99, and this Booongo Book slot comes with theoretical returns of 97.74 % (at least for the Bonus Buy option). It also comes with a choice regarding the expanding symbol in the bonus round, and payouts up to 5,000x your stake.

Book of Dead - is still the king of Book slots, despite customizable RTP ranges and plenty of “improved” versions from countless competitors. The math model is as finely tuned as a trimmed Ferrari, and the expanding bonus round symbols can lead to payouts up to 5,000x your stake.

Review Summary And Verdict

Relax Gaming has understood that you need to go a bit “extreme” to have a shot at the ‘Book of’ throne. The popular genre is as overcrowded with competitors as Queen Penelope’s home is filled with power-hungry suitors in King Odysseus absent. Paying homage to Homer, and The Odyssey in particular, is a nice touch, and the Book Collection system fits the motif perfectly, while also keeping you motivated.

The big headliner is undoubtedly the record-breaking 99 % RTP. Few games are even close to such numbers, and even fewer slots. Just like the Sirens enticed Odysseus' men to their destruction with their seductive songs, so might this “magic number” have the same effect on unwary punters. In our experience however, the base game can be as dry as the bones in the one-eyed Cyclops’ cave, and the expanding symbol you get will pretty much make or break your bonus round.

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