Book of Mystery Slot: Comprehensive Data Analysis
Core Game Specifications
| Attribute | Value |
|---|---|
| Developer | JDB168 |
| Release Date | 2022-04-01 |
| Theme | Ancient Egypt |
| Layout | 5×3 |
| Paylines | 10 |
| Bet Range | 0.1–0.5 |
| Core Mechanics | Expanding Symbols, Free Spins, Wild/Scatter Book symbol |
| Technology | JS and HTML5 |
Mathematical & Payout Model
Max Win Potential
5000x
Symbols & Paytable Hierarchy
| Tier | Symbol(s) | Function & Value |
|---|---|---|
| Low Tier | Scarabs, Ancient Artifacts | Provides small, frequent wins to maintain gameplay. |
| Mid Tier | Adventurers | Thematic items offering moderate payouts. |
| High Tier | Pharaoh Symbols | Highest paying symbols. Top hits available with full combinations. |
| Wild | Book symbol | Acts as a substitute / feature trigger per game rules. |
| Scatter | Book symbol | Triggers free spins / bonus round when enough appear. |
Book of Mystery Bonus Features Mechanics
| Feature | Trigger | Initial Award | Core Mechanic | Enhancement/Retrigger |
|---|---|---|---|---|
| Free Spins with Expanding Symbol | 3+ Book symbols | 10 Free Spins | Random standard symbol expands to cover reels during Free Spins | Can lead to big wins up to 5000× |
Frequently Asked Questions (FAQ)
| What is the maximum win in Book of Mystery? | You can win up to 5000× your stake. |
| What does the Book symbol do? | The Book symbol acts as both Wild and Scatter, substituting for other symbols and triggering Free Spins. |
| How do Free Spins work? | Landing three or more Book symbols triggers 10 Free Spins with a randomly selected expanding symbol. |
| Can the expanding symbol cover entire reels? | Yes, the selected symbol can expand to cover full reels during Free Spins. |
| What is the betting range? | You can bet between 0.1 and 0.5 per spin. |
Book of Mystery Performance Summary: Strengths vs. Weaknesses
Strengths
- Simple, classic Book‑style gameplay
- High max win potential (5000×)
- Engaging expanding symbol Free Spins feature
Weaknesses
- No RTP or volatility information available
- Low maximum bet may not appeal to high‑rollers
Overview
Book of Mystery is a 5‑reel, 3‑row video slot by JDB168 released April 1, 2022. It features 10 fixed paylines, a Book symbol that acts as both Wild and Scatter, Free Spins with an expanding symbol mechanic, and a max win of 5000× the stake.
Rachel Pine is our slots expert who has worked in the online gambling industry for 10+ years. Over the course of her career, Rachel has reviewed more than 30,000 slots.
Latest posts by Rachel Pine (see all)
- Best Online Casino Strategies That Actually Work - September 21, 2025
- Volatility in Online Casino Games - July 28, 2025
- Losing Streaks Explained: What Every Gambler Should Know - July 8, 2025