Book of Sun: Choice by 3 Oaks Gaming puts a fresh twist on the classic “Book” slot formula: you don’t just wait for the feature—you help shape it. When Free Spins hit, you get to choose a Special Expanding symbol, turning the bonus into a more personal (and often more exciting) chase.
Set against a moody, nighttime Egyptian backdrop, this slot is built for players who love straightforward base-game spins, a clear Free Spins objective, and that signature Book-style moment where one symbol can take over the reels. If you’re here to understand how the feature works—and how the “Choice” changes the feel of the game—this guide breaks it down.
Book of Sun: Choice by 3 Oaks Gaming — Game Specifications
| Category | Specification |
|---|---|
| Volatility Level | Not specified |
| Grid Size (Reels x Rows) | 5 reels x Not specified rows |
| Number of Paylines | 10 |
| Bonus Features | Free Spins: 12 spins triggered by 3+ Scatters (retriggerable); At the start of free spins, select a Special Expanding symbol (cannot choose Book); Buy Bonus (purchase free spins) |
| Special Mechanics | Book symbol acts as Wild and Scatter; Special Expanding symbols fill reels during free spins; Expanding symbols can create wins without adjacent placement; Special Expanding symbol fills entire reel during free spins; Expanding symbols expand only if enough symbols present to create a win; Retrigger: 3+ Scatters during free spins add 12 more spins and allow selecting an additional Special Expanding symbol |
Key Features And Gameplay Mechanics
At its core, Book of Sun: Choice is a fixed-line video slot that keeps the action easy to follow while reserving the biggest swings for the bonus. You’ll recognize the structure immediately if you’ve played Book-inspired titles before—but the feature selection adds a layer of control that’s worth understanding.
Reels, Paylines, And Win Direction
The game uses a 5-reel layout with 10 fixed paylines. Wins are evaluated on those fixed lines, and the general win flow follows the familiar pattern of matching symbols across the reels for line payouts.
- Fixed paylines keep the math consistent from spin to spin.
- Simple line wins make it beginner-friendly, while the bonus adds depth for feature hunters.
Symbols: Egyptian Classics With A Book Twist
You’ll see a mix of themed icons and higher-value character-style symbols. The standout, of course, is the Book symbol—because it’s central to both the base game and the bonus flow.
While exact symbol values are shown in-game in the paytable, the practical takeaway is:
- Lower symbols tend to land more often and help steady your base-game results.
- Premium symbols are the ones you hope to “feature” during Free Spins, because they typically have stronger payout potential.
Wilds And Scatters (The Book Symbol)
In Book of Sun: Choice, the Book symbol acts as both Wild and Scatter—a hallmark of the genre.
- As a Wild, it can substitute for other standard symbols to help complete line wins.
- As a Scatter, it’s your key to triggering the Free Spins bonus (details below).
One important nuance for the feature: during the Free Spins selection, you’ll be choosing from the Special Expanding symbols—and the Book itself isn’t one of the selectable options.
Base Game Flow: What You’re Spinning For
The base game is all about two things: collecting line wins and landing enough Book symbols to unlock the bonus. If you enjoy slots where the “mission” is clear (hit the feature, then let the feature do the heavy lifting), this is very much in that lane.
Bonus Features And Special Mechanics
The bonus suite is designed around one headline idea: when Free Spins trigger, you pick a symbol to become the star. That choice changes which symbol expands, how often you’ll see meaningful expansions, and what kind of payout curve you’re chasing.
Free Spins: How To Trigger The Feature
The Free Spins round begins when you land 3 or more Book (Scatter) symbols in the base game. When it triggers, you’re awarded 12 Free Spins.
From there, the “Choice” part kicks in: you select one Special Expanding symbol to be active for the bonus. This is the key decision of the entire slot—because your chosen symbol is the one that can expand and potentially dominate the reels.
Special Expanding Symbol: How The Expansion Works
During Free Spins, your selected symbol can turn ordinary landings into big-looking screens. The core behavior to know:
- Your chosen symbol is the only symbol that can perform the Special Expanding function in the bonus.
- When conditions are met, it can fill an entire reel, creating more ways for paylines to connect.
- The expansion is designed to matter—generally, it expands when it helps form a win, rather than expanding “just because.”
One of the most exciting traits in this game is that expanding reels can help create wins even when the symbol placements don’t look perfectly aligned at first glance. When a reel fills, it can effectively “cover” more payline positions—so a spin that looked average can suddenly connect into multiple line hits.
Free Spins Retrigger: More Spins, More Than One Expanding Symbol
Book of Sun: Choice doesn’t just offer retriggers—it makes them feel meaningful. If you land 3 or more Book symbols during Free Spins, you receive:
- +12 additional Free Spins
- the ability to select an additional Special Expanding symbol
That second part is huge. Instead of being locked into one symbol for the entire feature, retriggers can broaden your chances by adding another expanding option to the mix. In practical terms, it can increase the number of symbol types that can “take over” a spin—often improving the pace and variety of bonus outcomes.
Buy Bonus: A Faster Route To Free Spins
If you’re the type of player who mainly loads Book slots for the feature, Book of Sun: Choice typically includes a Buy Bonus option. This lets you purchase direct entry into the Free Spins round rather than waiting to trigger it naturally.
A few important notes about Buy Bonus play:
- The price is shown in-game and is commonly calculated as a multiple of your current bet (exact cost can vary by version and jurisdiction).
- Buying the feature can increase volatility in your session—because you’re paying upfront to jump straight into the highest-variance mode.
- It’s best used when you’re intentionally “feature hunting” and have a budget built for swings.
Technical Specifications
Volatility (What To Expect)
Volatility is best described as medium-to-high for Book of Sun: Choice, which is typical for Book-style slots where much of the upside is concentrated in the Free Spins round. In plain terms: you may see quieter stretches in the base game, while the bonus is where the bigger momentum swings can happen.
RNG And Fair Play
Book of Sun: Choice runs on an RNG (random number generator) model, meaning each spin outcome is generated independently. At Winna Crypto Casino, you can also benefit from a modern crypto-first environment built around privacy and speed—ideal if you value quick play sessions and seamless transactions.
Device Compatibility
This is a modern HTML5 slot designed to run smoothly on desktop and mobile browsers. Whether you’re playing on a phone, tablet, or computer, the layout stays readable and the feature selection during Free Spins remains simple to use.
How To Play Book of Sun: Choice
If you’re jumping in for the first time, here’s the quickest way to get comfortable:
- Set your bet to a level that fits your session goals (stake limits depend on currency and casino settings).
- Spin and look for line wins while watching for Book symbols.
- Trigger Free Spins by landing 3+ Book Scatters.
- Choose your Special Expanding symbol at the start of the bonus.
- Watch for retriggers—3+ Books during Free Spins add 12 more spins and let you pick an additional expanding symbol.
Gameplay Tips And Simple Strategy
Slots are ultimately games of chance, but you can still make smarter choices that improve your overall experience—especially in a game built around a selectable bonus symbol.
1) Pick Your Expanding Symbol With Intention
Your choice shapes the bonus. A practical rule of thumb:
- Lower-value symbols may land more often, which can mean more frequent expansions (but typically smaller wins).
- Premium symbols may land less often, but expansions can be more valuable when they connect.
If you prefer steadier bonus action, lean conservative. If you’re chasing bigger spikes, choose a premium option.
2) Treat Retriggers As The Real Power Play
The ability to add an extra expanding symbol on a retrigger can dramatically improve how the Free Spins round feels. If your early spins are quiet, remember: one retrigger can change the entire feature’s potential.
3) Use Buy Bonus Only When You’re Comfortable With Variance
Buying the feature is fun, fast, and volatile. If you do it, consider lowering your bet size compared to what you’d normally spin—so you can handle the swings that come with repeated feature entries.
Final Thoughts: Is Book of Sun: Choice Worth a Spin?
Book of Sun: Choice by 3 Oaks Gaming is a strong pick for fans of Book-style slots who want a bit more agency in the bonus. The nighttime Egyptian atmosphere keeps it familiar but fresh, while the headline mechanic—choosing your Special Expanding symbol—adds a satisfying layer of control without complicating the gameplay.
If you like fixed paylines, clear feature goals, retriggerable Free Spins, and the option to jump straight into the action with a Buy Bonus, this one belongs on your shortlist. Load it up, pick your symbol wisely, and see if the reels decide to fill the screen in your favor.