Reviewed by Stephen Cummings | Expected reading time 5 mins
- High RTP (99.00%)
- 5,000x max payout
- Lots of small wins which are often lower than the actual bet size
SITES WHERE YOU CAN PLAY BOOK OF 99 SLOT
GAME INFO AND RTP
| FEATURE: | INFO: |
| Slot: | Book of 99 |
| Theme: | Greek Mythology |
| Slot Provider: | Relax Gaming |
| RTP: | 99.00% |
| Release Date: | May 30 2022 |
| Slot Type: | Video Slot |
| Mobile Friendly: | Yes |
| Min/Max Bet: | £0.10 – £20 |
| Maximum Payout: | 5,000x |
| Reels: | 5 |
| Rows: | 3 |
| Paylines: | 10 |
| Free Spins: | Yes |
| Respins: | Yes |
| Bonus Game: | Yes |
| Multipliers: | Yes |
| Progressive Jackpot: | No |
| Scatter Symbol: | Yes |
| Wild Symbol: | Yes |
| Sticky Wild Symbol: | No |
| Autoplay: | Yes |
| Volatility: | High |
| Hit Frequency: | N/A |
BOOK OF 99: SLOT OVERVIEW
Last Updated: December 30, 2024Written by Stephen Cummings
Themed around ancient Greek Gods, Book of 99 is an online slot game developed by Relax Gaming. This Book of 99 slot review has been written with you, the player, in mind and will break down everything you need to know about this online slot machine in several easy to follow paragraphs.
BOOK OF 99: FIRST IMPRESSIONS
Straightaway the graphics reveal the Greek myth theme to Book of 99, the Cyclops symbol makes it especially obvious. There are two main ways to trigger the free spins bonus game in Book of 99. The easiest is by matching three scatter symbols on the reels, these are the book symbols. The second way is by collecting a total of 99 scatter symbols which are added up on the left hand side in the Collection feature.
When we played Book of 99 for real money (which you can watch in the YouTube video above), we triggered two bonus rounds, so if your plan is to fill the Collection meter, it is likely that during that time you will play several bonus games before reaching the 99. Despite triggering a total of 20 free spins, unfortunately we only managed to win just over £16 across both games whilst betting 50p per spin.
After around 10 minutes of gameplay, we did lose £20 overall. We liked the fact that the bonus game was fairly easy to trigger. However, we disliked how hard it was to trigger bigger wins. We never won more than £4 from a single spin which is an 8x multiplier.
BOOK OF 99 RTP AND FEATURES
The RTP of Book of 99 is one of the very best around at 99%. This makes Book of 99 one of the highest RTP slots in the UK alongside the popular Ooh Aah Dracula, Monopoly Big Event and Mega Joker. The only slot with a higher RTP is Ugga Bugga. You can see a deeper comparison between Ugga Bugga and Book of 99 via our slots comparison section.
As well as an incredibly high RTP, Book of 99 also comes with several modern and exciting slot features. The re-trigger free spins are a particular delight. Look out for the cyclops symbols which will trigger some high multiplier wins. The full list of features in Book of 99 can be found via our list below.
Features in Book of 99:
- Free spins
- Wild symbols
- Expanding wild symbols
- Scatter symbols
- Retriggers
- Re-spins
- Multipliers
EXPANDING SYMBOLS
During the free spins round, a special expanding symbol is selected and in addition to any normal line wins, pays out on all 10 lines according to the number of symbols landed.
COLLECTION
Whilst playing Book of 99, you will notice a collection meter to the left of the reels. For every wild symbol landed during the main game, you will get an extra step on the meter. The free spins will be triggered when the collection meter reaches 99.
The free spins will be played with a bet size corresponding to the average size of the bets used when filling up the meter.
BOOK OF 99 MAXIMUM PAYOUTS
Book of 99 has a maximum potential payout of 5000x the stake, which is above average in comparison with other video slots.
Book of 99 was released this year and is therefore an extremely modern online slot game which can be played at mobile slot sites and new online slot sites in 2025.
STRATEGIES FOR PLAYING BOOK OF 99
The SlotsHawk team tested Book of 99 at Casumo casino. As we already mentioned, we made bets of 50p per spin whilst playing, which is a low betting strategy. Unfortunately, there is nothing we can recommend which guarantees wins.
The high variance factor meant that we expected that wins were likely to be few and far between. However, the slot played more like a low variance won as we triggered quite a lot of low value wins.
EXTRA INFO
Book of 99 was released by Relax Gaming on 30/05/2022 and is one of the highest RTP slot games available. It is played on 5 reels and 3 rows with 10 total paylines. The volatility/variance level is high and it has a minimum bet of 10p per spin and a maximum bet of £20 per spin.
THE SLOTSHAWK VERDICT
“One of the highest RTP slot games in the UK, Book of 99 can be played at a variety of different online casino sites. SlotsHawk recommend this slot game due to its high RTP and also because it is simple to play.”
– SlotsHawk Casino Team
CONTRIBUTORS
Greetings, I’m Stephen Cummings
Stephen Cummings is often referred to as ‘The Oracle’. What he doesn’t know about slot games isn’t worth knowing. He’s our genius slot machine analyst who spends most of his time reviewing new games & sites.
Slots analyst since 2020
