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Book of 99 Slot ᐈ Demo game + Review

? Book of 99 is a cartoon-style ode to Homer Odyssey, and the volatile Relax Gaming video slot comes with a record-breaking RTP of 99 Collect 99 book scatter/wilds to bring King Odysseus home to Ithaca, and trigger the bonus round. You can also trigger it the regular way however, and it comes with a chosen expanding symbol for payouts up to 12075x your stake.

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User Rating: 8.0/10 (4 votes)

Provider:Relax Gaming
RTP 🔗: 99%
Variance: HIGH
Max Win: x12075.00
Betways: 10
Release: 04.05.2021
SlotRank: 2530
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GB
Online Casinos in United Kingdom where you can play Book of 99

We have scanned 718 casinos for the United Kingdom market and we have found Book of 99 in 36 of them. SlotRank for Book of 99 for United Kingdom is 2530.

Captain Spins GB

Up to 520 Bonus Spins

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18+. New players only. One welcome package per player. Max bonus bet £5, Min deposit £20 1st deposit: get 100 bonus spins, 2nd Deposit: get 120 bonus spins, 3rd deposit: get 140 bonus spins, 4th deposit: get 160 bonus spins. All spins are on slot game Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 7 days. Max winnings from bonus spins are equivalent to the number of spins awarded. Spins winnings credited as bonus. Bonus funds separate to Cash funds, and are subject to 35x wagering and withdrawal requirements. #ad
Skol Casino GB

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18+. New Players only. One bonus offer per player. Min deposit £10. Max bonus bet £5. Bonus funds must be used within 30 days & bonus spins within 10 days. Spins valid on Starburst only. Offer consists of: 1st dep: 100% up to £300 & 100 spins, 2nd dep: 75% up to £300 & 75 spins, 3rd dep: 50% up to £300 & 50 spins, 4th dep: 25% up to £300 & 25 spins, 5th dep: 100% up to £100. The 100 spins triggered on your 1st dep are credited at a rate of 25 spins per day over 4 days. Bonus spins winnings credited as bonus funds & capped at £50. For the 1st dep offer, this winning cap shall be applied to each set of 25 spins. Bonus funds separate to Cash funds and subject to 35x wagering. Terms apply. BeGambleAware.org
CasiGo GB

Up to 825 BS

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18+. New players only. One Welcome Package per player. Max Bonus Bet £5. Get 3 Bonus spins for every £1 deposited up to 165 spins for each of your first 5 deposits. Min. deposit is £20. All spins are on Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 10 days. Spins winnings credited as bonus and capped at amount equivalent to number of spins awarded. Bonus funds separate to Cash funds, and are subject to 35x wagering and withdrawal requirements. Terms Apply. BeGambleAware.org.
Hello Casino GB

Up to £500+50S

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18+. New players only. One bonus offer per player. Minimum deposit of £10, Max bonus bet £5 Bonus offer must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. Bonus spins are valid on the following games only: Gonzo’s Quest, Starburst, Asgardians Stone and Bloodsuckers 2 and winnings capped at £50 Bonus funds are 100% of your first deposit up to £100, 50% of your second deposit up to £250, 50% of your third deposit up to £150 Bonus funds are separate to Cash funds, and are subject to 35 x wagering the total of bonus, cash & bonus spins. Terms Apply. BeGambleAware.org. #ad
LeoVegas GB

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18+. Free spins - no deposit required & new players only. Claim within 3 days of registration & 3 day expiry. Free spins worth £0.10 each on Book of Dead, winnings paid as cash. Deposit offers available across any two deposits. Both expire 7 days after registration & have 7 days to wager once claimed. Deposit £10, £25 or £50+ & wager 35x for a cash reward. Only cash stakes qualify & wagering contributions vary. 5 free spins on Book of Dead with each qualifying deposit, 3 day expiry. begambleaware.org. Full T&C’s apply. #ad
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18+. New players only. Valid for 15 days after 1st deposit. Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 First 100 Zee spins 10/day. Spins must be used within 24 hours, Funds within 30 days. Bonus funds are separate to Cash funds, and are subject to 35 wagering (bonus + cash). Full terms apply. BeGambleAware.org #ad

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Book of 99 slot review

Last Update: 16.09.2021. Author: SlotCatalog.

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.

Reel-Screen
Book of 99 Slot Reel Screen

Book of 99 Slot Features

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 clearly 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.

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 expands 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.

The 200 Spins Book of 99 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.

Review Summary

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 Odyessues 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.

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 12075x your stake

Cons

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

If you love Book of 99 Slot you should also 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.

Video and Image gallery

Book of 99. Book of 99 slot
Book of 99. Book of 99 slot
Book of 99
Start Screen. Book of 99 slot
Start Screen. Book of 99 slot
Start Screen
Reel Screen. Book of 99 slot
Reel Screen. Book of 99 slot
Reel Screen
Win Screen 1. Book of 99 slot
Win Screen 1. Book of 99 slot
Win Screen 1
Win Screen 2. Book of 99 slot
Win Screen 2. Book of 99 slot
Win Screen 2
Big Win. Book of 99 slot
Big Win. Book of 99 slot
Big Win
Mega Win. Book of 99 slot
Mega Win. Book of 99 slot
Mega Win
Free Spins 1. Book of 99 slot
Free Spins 1. Book of 99 slot
Free Spins 1
Free Spins 2. Book of 99 slot
Free Spins 2. Book of 99 slot
Free Spins 2

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Book of 99 Slot FAQs

❔ What is the Return to Player of Book of 99?

The game comes with an exceptionally high RTP of 99 %. Beware however, as this number is only true for the long run (i.e. hundreds of thousands of spins, if not more).

❔ How volatile is Book of 99?

Volatility is rated high, but it felt pretty darn high when we tested it. Still, it might be a tad less rough than many other book slots.

❔ What is the biggest win possible?

You can win up to 12075x your stake in Book of 99, and this happens when the highest value Odysseus symbol expands on all 5 reels at the same time.

❔ How does the Book Collection System work?

Each book scatter/wild you land is collected in a meter illustrated by Odysseus' ship moving from Troy to Ithaca. Collect 99 books to fill the meter, bring the absent King home, and trigger the bonus round.

❔ Is there a free spins mode in Book of 99?

Yes, you can trigger the bonus round by landing 3+ scatter also. This awards 10 free spins, and a regular pay symbol is chosen up front to be the special expanding symbol.

❔ Can I play Book of 99 slot for free?

Yes, you can check out the free Book of 99 demo game at the very top of this page (UK players must verify age first). You will also find our list of scanned casinos up there, all confirmed to carry this title.

Scanned Countries

United Kingdom

United Kingdom. The Game Book of 99 available in 36 from 718 scanned casinos. Overall we have scanned casinos in 47 different markets. Book of 99 is available in 36 countries. Markets with the highest casinos quantity are: FI, CA, NO, DE

Country Scanned [i] With Game [i] In Lobby [i] SlotRank [i] Action
Finland FI 540 157 1 1401 See Data
Canada CA 474 155 2 1139 See Data
Norway NO 436 130 0 3342 See Data
Germany DE 473 120 2 764 See Data

Browse All Countries (36)

Book of 99 SlotRank

In May 2021 Book of 99 (Video Slots from Relax Gaming) reached its highest recorded position, #458 in the UK market. View the proof of achievement on the game’s SlotRank page.

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Book of 99 Free Spins and No deposit Bonuses

LeoVegas
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18+ No deposit required & new players only. Claim from “My Offers” within 3 days of registration & 3 day expiry. 10 free spins worth £0.10 each on Book of Dead, winnings paid as cash. 18+ begambleaware.org. Full T&C's apply. #ad
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