Every developer in the slot industry has a “Book of…” slot in its portfolio. Well, almost all of them. Yggdrasil had other Egypt slots on its mind before, but it has succumbed to the pressure with the Book Hotfire slot. It’s a “Book of…” slot made by AceRun, a smaller studio that releases slots through Yggdrasil’s platform. Book Hotfire is a real home run of a slot thanks to the familiar gameplay spiced up with a great atmosphere.
The slot has 10 fixed paylines and pairs high volatility with an RTP of 96.1%. It doesn’t reinvent the wheel, but it surely makes it way more fun. It’s yet another adventure where you seek gold buried deep under the sands through shady catacombs and ancient temples where dangers lurk around each corner. The only thing missing is Rich Wilde.
If you’re into “Book of…” slots and you wouldn’t mind another adventure, Book Hotfire is available for free and real money in all Yggdrasil top online slot sites.


Book Hotfire plays it close to the chest when it comes to the layout and design. It has a 5x3 setup and a familiar theme. The reels are set against an entrance of a dimly-lit Egyptian temple, just like what most of these slots feature.
On the reels, you’ll see low-paying hieroglyphs and premiums which feature ancient Egypt’s deities and pharaohs. Tutankhamun’s death mask pays a whopping 500x for five on a line. The other symbols pay less, including the book Wild/Scatter which pays 200x for the same combo.
The oriental music and sharp graphics create an immersive Egyptian atmosphere that we’ve grown to love. Thanks to the simple control placement, you won’t find the slot hard to play.
Book Hotfire may be set in the past but in terms of features, it’s 100% modern. The mobile slot is developed on the HTML5 platform so you can run it from a mobile browser on any Android and iOS device. Here, you can find all the best mobile slots available.
Before you set foot in the ancient temple, you’ll need to bet from $0.20 to $30 per spin. As per usual with “Book of…” slots, there aren’t many surprises in the base game. You’ll be relying on the top-tier premiums for the top rewards, and the good news is that the Book Symbol can step in as a Wild or play the role of a Scatter.
That’s the main feature in the game, with much better action to follow in the Bonus Round.
Three or more books in the base game will land you 10 free games. Before the round begins, the game will randomly pick an expanding symbol. Whenever it hits on the reels, it will expand to cover them, boosting the slot’s winning potential.
Another set of three or more books retriggers the feature with 10 free spins. There’s no cap on the possible retriggers, but unfortunately, no extra expanding symbols too.
This is a highly volatile slot that can be punishing if you’re not careful with your wagers. It’s a solid “Book of…” slot that follows the theme by the book, paying a maximum of 6,440x the bet.
Book Hotfire is a great Yggdrasil release in the famed niche. It works just like other “Book of…” slots but comes with modern audio and visuals that make it appealing. The atmosphere is immersive and the Book Wild is rewarding, so if you’re in for another sandy adventure, the Book Hotfire slot awaits at the new slot sites!


Karolis Matulis is a Senior Editor at Casinos.com with more than 6 years of experience in the online gambling industry. Karolis has written and edited dozens of slot and casino reviews and has played and tested thousands of online slot games. So if there's a new slot title coming out soon, you'd better know it – Karolis has already tried it.
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