Book of 99 Slot Review

Book of 99 Slot Review: Bonuses, Features & Free Demo

Book of 99 is Relax Gaming’s most popular “Book” game. As its name suggests, it comes with an RTP of 99%, which makes it the highest-paying Book slot made by a top developer. It surpasses the average return rate of Play’N GO’s popular Rich Wilde games, and with a large max payout, it’s a very attractive slot for low rollers and high rollers alike. 

Book of 99 Gameplay: What to Expect?

Book of 99 is one for the history buffs. The game’s theme is based on the Odyssey, the classic Greek tale. You and Odysseus share the same goal: getting back home. To do so, you’ll have to collect as many Book symbols as possible, helping steer the ship in the right way whilst triggering bonus rounds along the way.

What Makes Book of 99 Unique?

Both the theme and the game’s high return rate make Book of 99 one of the most appealing Book games ever made, as well as a Casino Wizard favorite. This slot features a payout well above what we usually see in the industry, leaving casinos with just a 1% house edge. For that reason, many sites that offer Relax Gaming slots opt to leave this game out of their galleries.

Besides, many games with high return rates have low fixed jackpots, but that’s not the case with Book of 99. With a max win of 12,075x, the slot is extremely lucrative, even if highly volatile. 

Bonus Features, Bonus Gameplay & Special Features

This game features letter symbols as low-paying symbols and character symbols as the higher value symbols of the slot. It works like a standard slot game, but there’s a catch: the Book symbol is this game’s wild as well as its scatter. That means that you can trigger special bonus rounds after creating a high-paying combination.

• Book Scatter/Wild: The Book symbol substitutes every other symbol in the game. However, if three or more show up on the reels, regardless of the position in which they’re at, the bonus round will trigger. 

Free Spins

Collecting three or more Book symbols triggers the game’s bonus round with 10 free spins. Before the round starts, the Book of 99 opens, and a random symbol gets chosen. The symbol chosen will become an expanding symbol during the free spin round. 

• If a character symbol is chosen, landing two on different reels makes them expand and triggers a win, even if they aren’t adjacent.
• If a non-character symbol is chosen, landing three on differentreels makes them expand. Likewise, that’ll trigger a win, even if the symbols aren’t adjacent. 

Collecting three or more scatter symbols during this round will retrigger the feature, resetting the free spin count to 10. 

Book Meter

At the left-hand side of your screen, you’ll see a bar that fills up whenever you collect Book symbols. The bar represents Odysseus progress towards home; once the meter fill ups completely, a round of free spins will trigger regardless of how many Book symbols you’ve landed on the last spin. 

This is just an additional way to trigger a free spin round, basically guaranteeing free spins will trigger regardless of whether you ever manage to land three or more scatters during the base game. It’s a fantastic feature, in our opinion, and part of why the game has an RTP of 99%. 

Here’s a trick: if the meter is close to being full, bet as much money as possible. The bonus round will always trigger with the value of the last bet you’ve placed!

RTP, Hitting Frequency & Volatility

The reason why this game has a high volatility is because you’re heavily dependent on Book symbols to earn high payouts. Bonus rounds play a crucial role during Book of 99 spins, as expanding symbols are your gateway towards the biggest multipliers. 

• RTP: 99.00%
• Hit Frequency: 29
• Volatility: High

Book of 99 RTP Industry Comparison

RTP

99%

High RTP

94%

95%

96.5%

97%

LOW

HIGH

HIGH

above average

average

Below average

LOW

Book of 99 is a slot with a high RTP rate of 99%. In the long run, players can anticipate receiving $99 back from every $100 bet on this game.

Free Demo of Book of 99

You can play this iconic online slot game for free by using the demo mode that we provide here:

Available Bonuses to Play Book of 99 for Real Money

Book of 99 is excluded from bonus play due to its high return rate. To enjoy the game with bonus money, you have to fulfill the bonus wagering requirements first. These are some online casinos with Book of 99 that offer free cash bonuses:

1	40 Exclusive Free Spins BITGATE Show bonus code	Claim bonus Bonus review
2	€5,000 + 200 Free Spins LETSGO Show bonus code	Claim bonus Bonus review
3	30 Free Spins on Verification	Claim bonus Bonus review

Best Book of 99 Alternatives

We love high RTP games, and we know you do too. We’re going to recommend a couple of alternative slots that have both high return rates and high max payouts. We’ve reviewed both of them: feel free to read our articles to find out our thoughts about each one.

Immortal Romance

Although Immortal Romance has a lower return rate than Book of 99, this casino game also has a max win of around 12,000x and comes with a higher return rate (96.86%) than the average slot game. It’s one of the most popular games in the Games Global catalog, which used to belong to Microgaming a few years ago. 

Mega Joker

Mega Joker is also a 99% RTP game, but this one is created by NetEnt. Gameplay is significantly different from Book of 99: the slot presents two sets of reels, with the upper set housing the game’s biggest payouts. This one offers much more classic gameplay than Book of 99, but also offers a progressive jackpot that usually “falls” around the $10k mark.