Book of Secrets™ – 10 Free Spins with Expanding Symbols

Egyptian Adventure with Expanding Free Spins

Book of Secrets™ combines classic slot mechanics with volatile Egyptian archaeology. The ancient book acts as both Wild and Scatter, triggering ten free spins where one symbol expands across entire reels for scatter-style wins.

96.05% RTP

10 Paylines

110K Max Win (EUR)

0.10 Min Bet (EUR)

80.00 Max Bet (EUR)

5×3 Reel Grid

Theoretical Return to Player

96.05%

Above Industry Average

Core Features & Mechanics

Wild & Scatter Book

The ancient Book of Secrets substitutes for all regular symbols and pays as a scatter. Three or more books anywhere trigger the bonus round. Landing five books pays 200x total bet, four books pay 20x, and three books pay 2x.

Ten Free Spins

When you land three book symbols, you receive 10 free spins with a randomly chosen Special Symbol. During free spins, a different reel set is used with higher symbol frequency. The feature can retrigger with the same Special Symbol for another 10 spins.

Expanding Special Symbol

One symbol (except Wild) becomes the Special Symbol at free spins start. After regular payline wins are paid, if enough Special Symbols appear for a win, they expand to cover entire reels and pay scatter-style without requiring adjacent positions or leftmost alignment.

Gamble Feature

Any win under 55,000 EUR can be gambled by guessing the next card color (red or black). Correct guesses double your win; wrong guesses lose it. You can use the HALVE option to collect half and gamble half. Maximum 10 consecutive gambles allowed per feature.

How the Free Spins Expansion Works

The expansion mechanic is what separates Book of Secrets™ from standard Egyptian slots. At the start of your ten free spins, the game randomly selects one regular symbol to become the Special Symbol—this could be the high-paying Explorer Woman (worth up to 500x), the Pharaoh Mask, Scarab Beetle, Ankh Cross, or even a card symbol.

During each free spin, wins are calculated in two phases. First, all regular payline wins pay left-to-right as normal. Then, if you landed enough Special Symbols anywhere on the reels to form a winning combination (minimum three for most symbols, two for the Explorer), those symbols expand vertically to fill their entire reel.

The expanded symbols then pay based on how many reels contain at least one, regardless of position or adjacency. This means three Scarab symbols scattered on reels one, three, and five will expand and pay as if they were a three-of-a-kind win—delivering the 3x multiplier (75x for five expanded reels with Scarabs).

Trigger Condition

Land three, four, or five Book symbols anywhere on the reels for scatter wins of 2x, 20x, or 200x total bet.

Symbol Selection

One symbol is highlighted as the Special Symbol before spins begin—watch for the golden frame animation.

Expansion Occurs

After payline wins, if you have enough Special Symbols for a payout, they stretch across their entire reel (all three positions).

Scatter Payment

Expanded symbols pay according to the paytable multiplier for that symbol, counting reels rather than adjacent positions.

Symbol Paytable & Multipliers

Explorer Woman

5: 500x | 4: 100x | 3: 10x | 2: 1x

Pharaoh Mask

5: 200x | 4: 40x | 3: 4x | 2: 0.5x

Scarab Beetle

5: 75x | 4: 10x | 3: 3x | 2: 0.5x

Ankh Cross

5: 75x | 4: 10x | 3: 3x | 2: 0.5x

Ace (A)

5: 15x | 4: 4x | 3: 0.5x

King (K)

5: 15x | 4: 4x | 3: 0.5x

Queen (Q)

5: 10x | 4: 2.5x | 3: 0.5x

Jack (J)

5: 10x | 4: 2.5x | 3: 0.5x

Ten (10)

5: 10x | 4: 2.5x | 3: 0.5x

All payouts are multiplied by your total bet amount. Paylines win left-to-right only; scatter wins (Book and expanded Special Symbols) pay at any position.

Volatility & Win Potential

Strengths

Above-average 96.05% RTP provides solid long-term value
Maximum win of 110,000 EUR at 80 EUR bet (1,375x stake)
Free Spins retrigger indefinitely with same Special Symbol
Expanding symbols can cover all five reels for massive scatter wins
Gamble feature lets you double wins up to ten consecutive times
Low 0.10 EUR minimum bet makes it accessible for small bankrolls
HTML5 build runs smoothly on iOS, Android, and Windows devices

Considerations

Medium-high volatility means frequent dry spells between bonus triggers
Only ten fixed paylines—fewer win opportunities than 20+ payline slots
Card symbols (10-A) dominate the reels and pay relatively low
Special Symbol choice is random; low symbols reduce free spin potential
Gamble feature not available during free spins
No progressive jackpot or multi-level bonus rounds
Theme is well-trodden (Book of Ra mechanic widely cloned)

Volatility Assessment: Book of Secrets™ exhibits medium-high volatility. The 96.05% RTP is calculated over millions of spins; short sessions can swing dramatically. The free spins feature is the primary win source—base game hits often return less than your bet. Budget for approximately 100–150 spins minimum to have a reasonable chance of triggering the bonus round at least once.

Common Questions

The Explorer Woman is the highest-value Special Symbol, paying 500x for five expanded reels, 100x for four, and 10x for three. However, higher-value symbols appear less frequently on the free spins reels. The Pharaoh Mask (200x for five) and the premium Scarab or Ankh (75x for five) offer a better balance between payout and hit frequency. Card symbols (10, J, Q, K, A) are disappointing Special Symbols due to their low multipliers, though they land more often.

Yes, landing three or more Book symbols during the free spins awards another ten spins with the same Special Symbol that was chosen at the start. There is no limit to the number of retriggers—theoretically, you could continue retriggering indefinitely, though the probability decreases with each additional retrigger. Each retrigger adds ten spins to your remaining count.

After any win (except during free spins), you can press the GAMBLE button to enter a card-guessing round. The game shows a face-down card, and you predict whether it will be red or black. A correct guess doubles your current win; an incorrect guess loses it entirely. You can gamble up to ten consecutive times per feature or until you reach the 55,000 EUR limit. The HALVE button credits half your win to your balance and gambles the rest. Note: The cards displayed are cosmetic—the outcome is predetermined by the RNG.

Incomplete games are automatically resolved after 131 hours (approximately five and a half days). The remaining free spins will play out automatically using your original bet amount, and any winnings will be credited to your account balance. When you return to the game before the 131-hour window, you can resume the free spins manually from where you left off.

Yes, Book of Secrets™ is built with HTML5 technology and runs natively on iOS (iPhone/iPad), Android smartphones and tablets, and Windows desktops without requiring a download. The game automatically adjusts the interface for touch controls and portrait or landscape orientation. The 720p HD resolution ensures sharp graphics on modern mobile screens.

Responsible Gambling & Fair Play

Book of Secrets™ is regulated for players aged 18 and over. SYNOT Games displays the BeGambleAware.org logo prominently on the loading screen and provides in-game access to responsible gambling tools.

The 96.05% theoretical RTP is independently certified and calculated over the entire game cycle, including all features. Individual sessions will deviate from this average. The maximum possible win in any single game round is capped at 110,000 EUR to comply with regulatory requirements.

The game includes a MENU button that provides access to game history, session time tracking, and links to support organizations. The autoplay feature stops automatically when free spins start or end, preventing unmonitored extended play during bonus rounds.

Set deposit limits and session time limits through your casino operator before playing. If you feel your gambling is becoming problematic, use self-exclusion tools or contact BeGambleAware.org for confidential support.

Fair & Certified

Certified RNG ensures every spin outcome is random and independent. Game fairness is audited by independent testing laboratories. All game rules and payout tables are transparently displayed in the HELP section accessible during gameplay.