Book of Power: Slot Overview

Showing this partnership is anything but a one-off, software provider Relax Gaming and gambling community Casinogrounds have teamed up yet again to deliver another online slot for players to get stuck into. It won’t necessarily be everyone’s cup of tea, but anyone with a particular fondness for the theme should find plenty to like in this latest collaboration. The game is called Book of Power, and the title pretty much spells out what’s in store: books, Ancient Egypt, and a healthy dose of expanding symbol action. Their earlier joint efforts have been creative and polished, so we were keen to fire it up and see how Book of Power holds up.

Relax Gaming has plenty of experience under its belt, and players have come to anticipate a mechanical twist or two, usually wrapped in an attractive presentation. Book of Power is an easy-on-the-eyes slot that brought to mind a Push Gaming title such as Mystery Museum, with a dash of Print Studios’ Book of Destiny for extra flavour. The numbered frame around the reels (depending on screen size) nods to the long-running ‘book of’ tradition, though Relax Gaming has moved away from the more old-school look by giving the background visuals a more realistic touch.

Once the first look is out of the way, it’s time to put Book of Power through its paces. First up, choose a base stake of 10 p/c to $/€30, then decide whether or not to activate the Power Bet option. Switching on the Power Bet doubles the stake and unlocks the possibility of triggering Power Free Spins while increasing the chance of triggering any free spins feature by 170%. The game’s volatility comes as no shocker—it’s high—while RTP depends on how you play: 96.11% on standard spins (with the Power Bet either on or off) and 96.5% when purchasing either free spins option. With Power Bet enabled, players can also gamble to win Power Free Spins when regular free spins are awarded.

Book of Power keeps things classic by running on 10 fixed paylines for forming winning combinations. Five symbol types are the familiar 10-A card royals dressed up in regal style, while the four premium symbols include three Ancient Egypt-themed icons plus an explorer character as the top payer. A five-of-a-kind line returns 10-15x the bet for low symbols, or 75 to 500 times the stake for the higher-value ones.

Book of Power: Slot Features

Book of Power comes with not just one but two Book symbols—a standard Book and a Power Book. Books are wild, meaning they replace any (non-expanded) paying symbol, and they also serve as the scatter for triggering free spins.

Free Spins

Hitting 3, 4, or 5 Book symbols grants 10, 15, or 20 free spins and also awards 10x, 100x, or 500x the bet, respectively. At the beginning of the feature, a pay symbol is selected to act as the special expanding symbol. During free spins, in addition to regular line wins, whenever they can create a win, expanding symbols expand to cover all positions on their reels, paying all ways from any position. If 2 Book symbols appear during free spins, an additional expanding symbol is chosen and 5 extra free spins are added. If the newly selected random symbol is already active as an expander, it receives a +1 to its multiplier, up to 9.

Power Free Spins

When one of the 3, 4, or 5 triggering Book symbols is a Power Book symbol, players are awarded 10, 15, or 20 Power Free Spins plus a payout of 10x, 100x, or 500x the bet, respectively. In Power Free Spins, a special expanding symbol is randomly picked, which expands to cover reels and pays all ways from any position as described above. When 2 Book symbols land, the current expanding symbol is upgraded by one step, and +5 free spins are also awarded. Upon reaching the highest-paying symbol, any retriggers award +1 multiplier for the expanded symbol – up to 9. In addition, landing a Power Book on reels 2, 3, or 4 turns that reel golden, meaning the expanding symbol expands even if no expanding symbol actually landed on the reel.

Lucky Boost

Lucky Boost can appear in either free spins mode. It may trigger randomly at the start of a free spin, increasing the chance of hitting something big.

Feature Buy

Book of Power includes two buy options. Regular free spins can be purchased for 100x the bet, while Power Free Spins are available for 200x the bet.

Book of Power: Slot Verdict

This Relax Gaming/Casinogrounds pairing is becoming a familiar sight, and for many players that’s only a positive. Past releases have delivered bold ideas, big characters, feature-packed gameplay, strong visuals, and plenty of reasons to come back for more, with Net Gains, Beast Mode, and Iron Bank all standing out as solid slots. Book of Power takes a slightly different route. For one thing, it’s a more traditional experience. That’s largely to be expected when working within the ‘book of’ framework, though it’s not mandatory—Book of Shadows shows how far the formula can be pushed. Here, unlike Nolimit City’s approach, Relax Gaming and Casinogrounds mostly stick to the classic template, while adding a couple of newer touches to freshen things up and give genre fans something extra to think about.

Sure, some ideas aren’t entirely new—like retriggers that introduce an extra expanding symbol into the round. Still, the decision to focus on upgrading a single expanding symbol and bringing multipliers into play, even if it won’t happen constantly, adds a nice layer of tension. Some players may prefer expanding royals since they’re likely to connect more often, but for anyone chasing the top end of the paytable, the appeal of landing the best symbol as the expander is increased by the possibility of it also carrying a multiplier. This approach also lifts Book of Power’s win potential to a top prize of 15,000 times the bet.

As far as we can tell, nobody has been complaining about a lack of choice in the ‘book of’ space, and the reason these games remain popular is obvious. Even within this crowded, arguably overstuffed selection, Book of Power stands out as a smoothly made alternative, with the audio-visual polish, character, and gameplay to compete confidently with its rivals.