Please enter an email address
Lost password
Don’t have an account yet?
Open account


Start playing at LeoVegas today with 50 FREE SPINS plus up to £100! Spin the reels of this intergalactic slot and get a taste of its expanding wilds and respins.

T&Cs apply. New reg only. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 25 wager-free spins x10p to added to Starburst with each qualifying deposit, 3 day expiry.

Book of 99


Description of Book of 99

The Book of 99 slot game is a recent release from Relax Gaming with a great look, an epic soundtrack, and an excellent free spins feature. Collect scatters or land three at once to trigger free spins with expanding symbols for a chance at the max jackpot of 12,075x bet!

What are the special features of Book of 99?

Book of 99 is a slot centred around its free spins feature. There are two different ways to trigger this feature, both giving a random expanding symbol for added win potential.

Free Spins

Land three wild/scatter symbols on the reels, and you will trigger the free spins feature. You will be given 10 free spins with an expanding symbol selected. Three or more wild/scatters landing during the feature will trigger a further 10 spins.

Wild Collection

Every time a Book wild/scatter symbol lands in the base game, it will be added to a trail on the left-hand side of the reels. Even symbols that trigger the feature will be added, and the trail will not reset if free spins are earned. When the trail reaches 99 symbols, the free spins feature will trigger. The free spins here are the same as the feature triggered by three scatters, 10 spins and an expanding symbol.

Expanding Symbol

Before the free spins feature takes place, an animation will play where the pages of a book open and stop on a random symbol. That symbol will then expand every time it lands on the reels as part of a winning combination, raising the chances of potential wins during this feature.

Game info about Book of 99

Book of 99 was launched by Relax Gaming in 2021. The slot has a mythological theme with characters and monsters appearing on the reels, while a spooky, rock-covered landscape creates the backdrop. The soundtrack has the same gloomy, eerie tone as the artwork, with all aspects combined to bring the slot to life.

This provider also have this to offer

Relax Gaming is a developer known for producing a wide array of slots in terms of themes and features. Some of the best titles from this much-loved developer include Kluster Krystals MEGACLUSTERS, Iron Bank and Money Train 2.

Similar slots from different providers

The Book of style is one of the most popular slot types from developers in recent years. As a result, there are numerous titles similar to Book of 99 that are worthy of attention, including Play’n GO’s Book of Dead, Book of Toro from ELK Studios, and Book of Ra: Mystic Fortunes by Novomatic.


How to win in Book of 99 base game

To win in the Book of 99 base game, you need to land three or more card symbols or two or more high-value symbols on a payline.

How to play Book of 99

When you fire up the Book of 99 slot machine, the first thing you need to do is set your bet per spin amount. There’s a stack of coin symbols on the right-hand side of the screen. Select this to pick your stake value between £0.10 and £100.00.

Once you’ve chosen your desired bet per spin value, it’s time to start playing. You can spin the reels by pressing the play button.