Book of Truth: Slot Overview

Yet another ‘book of’ themed slot arrives, this time from the developers at TrueLab. With their first entry into the well-worn ‘book of’ niche, the studio leans into the familiar genre staples but adds a smart adjustment to the free spins, which results in a bigger max win than you typically see. Launching one of these titles can sometimes feel like taking the safe route, but Book of Truth mostly sidesteps that criticism thanks to strong production values and a neat feature variation.

In Book of Truth, players step toward a torchlit Egyptian temple at night, with braziers blazing in the background. Gameplay takes place on a 5-reel, 3-row layout, where 1-10 paylines can be chosen. The Ancient Egypt theme is turned up high, with statues, fire, and gold creating plenty of spectacle, helped along by a dramatic soundtrack with heavy Arabic touches and prominent vocals. Yes, the setting is extremely familiar, but Book of Truth sells it effectively, even down to a visible heat-haze shimmer across the scene.

Because paylines can be adjusted, staking begins at 1 p/c per spin, rising to $/€100 for those playing bigger. Some seasoned slot fans may not love Book of Truth’s medium volatility, though the fresh bonus idea and above-standard 15,000x potential help balance that out. The base RTP is also respectable at 96.33%, and there’s no indication of whether this figure changes when the bonus is purchased.

In Book of Truth, standard payouts land when three low-value 10-A card symbols connect left to right from reel one, or when at least two premium symbols appear. Premium icons feature Anubis, Bastet, and Horus, plus an adventurer character who, to be blunt, looks less like a classic explorer and more like a villain—still, he’s wearing the Indiana Jones-style outfit, so it works. Premium payouts run from 75 to 500 times the stake, meaning a full screen of Indianas delivers the familiar 5,000x win you’d expect from this type of slot. Now, onto the features.

Book of Truth: Slot Features

The free spins round is where the expanding selected symbol can combine to create full-screen payouts. The twist is that Book of Truth includes two bonus games instead of the usual single option. Both revolve around the book symbol, which functions as both wild and scatter. When acting as a wild, the book substitutes for other symbols to complete line wins, except for expanded symbols.

Hitting 3 or 4 scatters triggers 10 free spins and awards 2 or 20 times the stake. Before the free spins begin, a regular random symbol is selected as the expanding one. During the feature, chosen symbols expand whenever they are able to create a win. Expanded symbols pay all active ways no matter where they land on the grid, meaning they don’t have to sit next to each other.

Things become far more intriguing when 5 scatters appear, awarding 10 True Free Spins along with 200x the bet. Here, no single symbol is picked to expand. Instead, all regular symbols are expanding symbols throughout True Free spins, working exactly as outlined above.

Players who enjoy ‘book’ slots will likely be drawn to the True Free spins concept, and where available, either free spins mode can be bought directly. As expected, the two options are priced very differently: 10 Free Spins costs 89x the stake, while 10 True Free Spins costs 536 times the stake. Both prices assume all 10 lines are enabled, and the cost changes if you reduce the number of lines.

Book of Truth: Slot Verdict

Earlier titles, such as Legacy of Dead, could technically turn every pay symbol into an expanding symbol during free spins. The catch was that you needed retriggers to make it happen, and stacking up that many retriggers is extremely unlikely in real play. That’s what makes True Free Spins stand out, as all regular symbols expand right from the beginning of the feature. Of course, landing five scatters isn’t simple either, which is why the bonus buy can look appealing—though it’s undeniably expensive.

Another welcome point is that the feature change also boosts the game’s upside. It’s common to see a ‘book’ slot introduce something that sounds exciting, only to still top out at the standard 5k max win, which feels odd given that’s what most of them offer anyway. Book of Truth avoids that, with winnings capped at 15,000 times the stake. According to the rules, the biggest result achieved in simulations was 12,000 times the bet, occurring once in a billion test rounds. Outside of True Free Spins, Book of Truth plays much like a typical ‘book’ slot, just with better-than-average presentation. Still, the possibility that five scatters can unlock something different—and far more lucrative—puts Book of Truth nearer the front of the line for anyone craving this style of game.

At face value, Book of Truth is another ‘book’ follower, but it’s also among TrueLab’s strongest releases. Working from a familiar framework gives the game a clear foundation, while leaving room for the studio to add its own creative touches. They’ve done that effectively here, delivering one of the more interesting free spins tweaks seen in a while. The atmosphere is excellent, it suits virtually any bankroll, and it has an all-expanding-symbol mode waiting for those who either hit five scatters or decide to pay to access it.