Popular "Book of" Slots
"Book of" slots are a fan-loved genre built around a simple idea with big excitement: the Book symbol acts as both wild and scatter, and free spins feature an expanding symbol that can cover entire reels for line wins in any position.
Most games employ a clean 5×3 layout with crisp pacing and quick-read paytables that are optimised for mobile devices. The appeal is consistency with variety: you know the core loop, yet each title adds a twist through theme, reel math, or bonus extras like retriggers, multipliers, or multi-expanding symbols.
In this guide, we spotlight popular "Book of" slot game picks you can find at LeoVegas Canada, from modern takes with bonus modifiers to classics that defined the category.
We’ll keep things practical: what each game is about, what’s unique in its features, and how the "Book" mechanic shows up, so you can decide which adventure suits your style of play.
Book of Dead
Arguably the most popular “Book of” slot available, this Play’n GO entry is a classic across the world of online casino.
The game takes place in an Ancient Egyptian tomb where players will discover a 5-reel game grid with 10 paylines available.
To trigger the bonus feature in this title, you will need to land three or more of the Book of Dead symbols. These special symbols act as both the scatters and the wilds. During the free spins round, the special symbol expands to cover an entire reel and can help to complete winning combinations.
Book of 99
Relax Gaming’s Book of 99 stands out for one number: a 99% RTP. Beyond that headline stat, it plays like a modern "book" slot with 5x3 reels and 10 paylines, where the Book acts as both wild and scatter.
Free spins trigger either in the usual way (3+ books) or by collecting 99 book symbols in the base game.
In the bonus, a random symbol becomes "special" and expands to cover reels when it can form wins, with potential up to 5,000x your bet.
The Greek mythology theme and the extra collection route to free spins give it a distinct rhythm compared to more traditional Egyptian takes on the genre.
Book of Oz
Book of Oz by Triple Edge Studios brings a wizardly twist to the format with its respin feature; paid respins of individual reels that let you chase scatters or line-ups after any spin.
Free spins arrive with 3+ book scatters (10/12/25 spins), and a randomly chosen symbol expands during the feature for those familiar "book" full-reel hits.
It’s a 5x3, 10-payline setup with high volatility and a 5,000x top win, but the respin mechanic is the real hook, adding a layer of decision-making you don’t often see in this subgenre.
Book of Gold: Classic
Playson’s Book of Gold: Classic keeps it pure and simple: 5x3 reels, 10 fixed paylines, and the golden book as a scattered wild.
Land three or more books to trigger free spins, then watch a randomly chosen special symbol expand to cover reels and pay from anywhere on a line.
It’s a high-volatility, back-to-basics "book" experience that leans on clean visuals and the tried-and-tested expanding symbol mechanic rather than side features, making it a good pick if you want the classic feel without distractions.
Book of Golden Sands
There are changes to the grid and the math here with Pragmatic Play's Book of Golden Sands. Unlike the other games featured so far, it plays on a 6x3 layout with 729 ways to win.
You still get the Book as a wild/scatter and a free spins round with special expanding symbols, but the wider reel set creates bigger screen coverage moments. Wilds can also add multipliers to wins, and the ways-to-win format keeps the action brisk.
If you like "book" gameplay but prefer broader reels and a high-energy bonus capable of stacking expansions, this is a strong option.
Book of Mega Moolah
Book of Mega Moolah fuses the "book of" format with the famous Mega Moolah progressive jackpots. Under the hood of Games Global's slot is a classic 5x3, 10-payline setup with free spins and an expanding special symbol, but you also have the Mega Moolah jackpot wheel that can trigger randomly for a shot at Mini, Minor, Major, or the top Mega prize.
It’s all about that extra chance to trigger a progressive jackpot on any spin, with familiar African visuals and the volatility you’d expect when progressives are in the mix.
Book of Atem
All41 Studios’ Book of Atem goes traditional Egyptian with crisp presentation and a calm soundtrack. The Book symbol works as a wild and scatter; 3+ books award 10 free spins with a random special symbol that expands when wins are possible, and retriggers are on the table.
It is a 5×3, 10-payline, high-volatility package with a max win of up to 5,000x your bet.
Expanding symbols pay on any line position during the bonus, which is why full-screen hits are the dream scenario.
Book of Vikings
Pragmatic Play’s Book of Vikings sticks to the 5×3, 10-payline blueprint but swaps pyramids for longships. The book acts as wild and scatter; three or more books award 10 free spins with a randomly selected expanding symbol, and retriggers add another 10 spins. Scatters also pay 2x, 20x, or 200x your bet when 3, 4, or 5 land, which gives the trigger some immediate value.
High volatility and a default RTP around 96.5% are typical of the series, with a max win of up to 5,500x, making it a punchy option if you enjoy Norse styling on a classic mechanic.
Book of King Arthur
Just For The Win takes the "book" idea to Avalon. In Book of King Arthur there are 10 paylines, free spins with an expanding special symbol, and a couple of extras: a boost mode that turns wilds into expanding wilds when active, and a Bonus Buy button to jump straight into the feature for 80x your stake.
Special symbols that expand during the bonus as well do not need to appear on the first reel to trigger wins, so even if they appear in reels four and five, you'll still grab the win.
It keeps that core expanding-symbol excitement, but with a medieval theme and some quality-of-life tweaks for players who like quicker access to bonuses or more dramatic base-game wilds.
Book of Kingdoms
Developed by Pragmatic Play's Reel Kingdom studio, Book of Kingdoms blends "book" free spins with a Hold & Win-style money respin with a max win of up to 20,000x your bet.
It uses a 5x3, 25-ways setup. Hit three scatters to get free spins with an expanding symbol, or land 5+ coin symbols to trigger respins where sticky coins and jackpot coins (Minor, Major, Mega) can land, resetting the counter and building total awards.
That dual-feature mix adds variety, especially if you enjoy coin-collect respins alongside the usual expanding screen moments.
Book of Destiny
Print Studios’ Book of Destiny (via Relax Gaming’s Silver Bullet) adds player choice to the classic model.
After three books trigger 10 free spins, you choose the symbol that will expand during the bonus. You can also take the Destiny Gamble to try to start with up to three expanding symbols, which raises potential but risks losing an extra pick if the wheel lands on a losing segment.
For those who choose to simply play the standard free spins, they can be retriggered to add more spins and another expanding symbol.
The 5x3, 10-payline frame is familiar, but those choices, and extra base-game functions to trigger the feature give the bonus a more tactical feel without losing the core appeal of expanding wins that could reach as high as 10,823x your bet.
Book of Time
Hacksaw Gaming’s Book of Time runs two distinct bonuses. "It’s a Classic!" is the traditional free spins with expanding symbols: 3, 4, or 5 books award 10, 15, or 20 spins and 1, 2, or 3 special symbols that pay anywhere when they expand.
"What Time Is It?" is a second bonus that uses wild multiplier clocks above the middle reels; when activated, multipliers can drop and stack, with values up to 12x, creating big combo potential.
With 20 fixed lines across a 5x5 grid, a max win of up to 10,000x, and Hacksaw’s off-beat art starring Canny the Can, it delivers both the comfort of the "book" mechanic and a more modern, multiplier-heavy alternative.
LeoJackpot And "Book Of" Slots
LeoJackpot is LeoVegas’ in-house progressive jackpot that you can choose to play for while you spin. The "Book of" games listed above are all part of the eligible catalogue, so you can enjoy their expanding-symbol bonuses while also being in with a shot at LeoJackpot whenever you’re opted in.
To take part, opt in on the jackpot bar in any eligible game, and a small, fixed contribution of $0.15 is added to each round; opt out any time if you prefer to play without it. The jackpot values update in real time on the bar, so you always know what you’re playing for.
Any opt-in spin can randomly trigger the LeoJackpot Wheel. When it lands, the wheel guarantees one of four tiers and pays instantly, after which that tier resets to its seed value.