Duelz Casino
Slot by Relax Gaming

Book of 99

Updated for
Written by: Guy Evans
Top Rated Relax Gaming Casino
Duelz Casino

100% up to £100 + 100 Free Spins

  • Unique Casino and Bonus Reward System
  • Full PayPal Support
  • Generous Free Spins

Intro

Pros

  • 99% RTP
  • Collection meter
  • Two ways to trigger free spins bonus
  • Potential for big wins

Cons

  • High volatility not suitable for all players
  • Could include more bonus features

Top Rated Book of 99 Casinos - February 2024

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TopRatedCasinos.co.uk is dedicated to helping customers find the best place to play online. Your safety and well-being is a priority, which is why all of our expert casino reviews are 100% honest and unbiased, and we highlight the key terms and conditions of every casino bonus we advertise. Whilst we accept commission from the casinos on our list of recommendations, and this may affect where they’re positioned on our lists, we only recommend casinos that we truly believe are safe and fair.

TopRatedCasinos.co.uk is dedicated to helping customers find the best place to play online. Your safety and well-being is a priority, which is why all of our expert casino reviews are 100% honest and unbiased, and we highlight the key terms and conditions of every casino bonus we advertise. Whilst we accept commission from the casinos on our list of recommendations, and this may affect where they’re positioned on our lists, we only recommend casinos that we truly believe are safe and fair.

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WELCOME OFFER

100% up to £100 + 100 Free Spins

Expert Review
New players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30x sum of deposit + bonus. Free Spins are given 20 per day on Book of Dead for 5 days in a row, log in is required. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45x. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. www.begambleaware.org. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Screenshots

Gameplay, RTP, and Variance

7/10

The first thing you’ll notice about Book of 99 is its RTP percentage, which sits way above average at 99%. RTP is a measurement of a slot’s payout rate, providing a rough estimate of how much players can expect to receive back from a slot over time. An RTP of 99% means that, on average, players will receive £99 back from every £100 wagered. However, these percentages are calculated from millions of simulations, so you should always take this figure with a pinch of salt.

Part of the thrill of gambling is that you never know what you might win. Although RTP rates can give a rough estimate, a slot’s variance, or volatility, is the component that provides variety in the rate. Book of 99 is classified as having high volatility, which means it’s expected to pay out larger amounts at infrequent rates. This makes the game more suitable to those with bigger bankrolls.

In terms of gameplay, Book of 99 takes place on a simple 5×3 grid. Players are looking to match winning combinations from left to right, with standard playing cards comprising the lowest-paying symbols. The remaining symbols are made up of characters from Greek mythology, and landing combos of these will bring bigger rewards. You’ll only need to hit two of these higher-paying symbols along a payline to win a small cash prize.

Bonus Features

6/10

This slot’s predominant bonus feature is the free spins round, and there are two ways to trigger this. The first and easiest way is to land three of the scatter symbols – the eponymous book, which also serves as the wild – anywhere on the reels.

You’ll notice these scatters being collected in a meter to the left of the reels each time they land. If you manage to collect 99 of them, this will also trigger a round of ten free spins.

Before the free spins take place, the book will open to reveal one symbol. This symbol is to become the nominated stacked wild for the duration of the free spins round; if you land three of these symbols in a single spin, each of them will fill their entire reel, generating bigger wins.

Unfortunately, any book symbols that appear during the free spins won’t contribute to your overall collection, but landing an additional three on one spin will reset the bonus round.

Mobile and Tablet Experience

7/10

Modern online casinos cater as much to the mobile player as they do to the desktop. This means you can spin the reels of Book of 99 on the go – whether that’s in your mobile browser or on your casino’s native app. If you can, we recommend the latter, as doing so offers a slicker gaming experience, and allows for more targeted promotions.

Design, Graphics, and Sound

7/10

Relax Gaming has chosen ancient Greece as the setting for Book of 99, and we enjoy the cool, Aegean waters that calmly hum under the moonlight in the background. If you manage to launch the free spins bonus, you’ll be transported to a daytime set of reels that looks like something out of Disney’s Hercules. The reels themselves are laid within an ancient temple, and the bonus meter charts a route across the sea towards mainland Greece.

It’s a simple design and a tried and tested theme, but it’s beautifully presented. In particular, the motion of the book scatters collecting in the meter is consistently pleasing – even watching it happen for the 100th time! The tumbling soundtrack adds tempo to the scene, but if there’s a lull in gameplay, this makes way for the natural sounds of the Grecian coastline.

Summary

6.8/10

While we think Relax Gaming could be braver with its choice of theme and selection of bonus features, Book of 99 is sure to please any fans of standard 5×3 reel gameplay. The combination of scatters and free spins is generous during the bonus round, particularly given that this round can be retriggered. It looks and sounds great, and with an RTP of 99%, what’s not to like?

Play Book of 99 at One of These Top Casinos

Here are three recommendations of the best Book of 99 casinos.

Playzee

You’ll be greeted upon arrival at Playzee by Zeegmund – a nutty professor who spends his time concocting new bonuses and promotions. The first of these is a huge welcome bonus that comes in the form of a matched deposit of 100% up to £300, plus 100 free spins to use on Starburst. One of the best things about this casino is its loyalty points scheme: each deposit you make will be matched by a loyalty points reward, and you’ll receive 500 of these as soon as you sign up.

SpinYoo

At SpinYoo, new players can decide from a choice of two welcome bonuses: a 100% matched deposit up to £250, plus 100 spins on selected slots; or if you prefer the table game experience, a 100% matched deposit up to £100 to use on this half of the casino. With bonuses every Monday, free spins available every day, a weekly live casino challenge, and a nominated game of the month, the promotions keep on coming for existing customers. You’ll also receive 500 Yoo Points when you make your first deposit.

PokerStars Casino

PokerStars is primarily known for its table game excellence, but it still boasts over 1,000 slots in its library, and Book of 99 is one of them. You’ll receive 100 free spins straight off the bat when you become a member at this casino, no deposit required. Then, if you spend £10 of your own money, you’ll pick up another bundle of 150 free spins. One of the best things about this site is its vast list of payment methods: there are 16 options on the depositing side, and 12 available for withdrawals.

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