Spinomenal

Book Of Sirens

Slots Video Slots Fantasy Mythology Book Gems Sea Monsters

Underwater mythology interpreted through the book-slot format

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

96.14%

return to player

Volatility

—

variance

Max win

5,000×

top multiplier

Min bet

$0.10

per spin

Reels

10 lines

Player rating

3.9 ★

6 votes

DEMO Play free, no signup

Spinomenal

Embed on your site

3.9 / 5

6 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP9/10

RTP 96.14% → 9.0/10

Volatility8/10imputed

imputed medium (unknown) → 8.0/10

Win Potential7.4/10

x5000.00 (5000×) → 7.4/10

Features8/10

13 features → 8.0/10

Game Mechanics4.2/10

f=13 r=5 p=10 → 4.2/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.1–100 (×1000) → 6.0/10

Provider Reputation5.7/10

provider avg 5.7 → 5.7/10

Popularity5/10

synthetic proxy → 5.0/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 71 — Book Of Sirens by Spinomenal

https://slotranker.com/spinomenal/book-of-sirens#score

How to cite

Slot Summary

Sirens and legendary sea creatures give Book Of Sirens its underwater interpretation of the book-slot formula. Spinomenal connects that setting to a bonus in which a selected symbol can occupy whole reels. The feature's character comes from which symbol receives that role, making the selection before free spins more consequential than the ordinary reel presentation.

How It Plays

Ordinary combinations pay along fixed lines starting from the leftmost reel. The book symbol can substitute for regular symbols, helping complete a combination when one of its required symbols is missing.

The same book also acts as the scatter, linking line play to bonus entry. Its appearance therefore has two possible functions: assisting an ordinary payout and contributing toward the free-spins trigger.

Bonus & Free Spins

At least 3 books trigger 10 free spins. Before those spins start, a wheel selects the special expanding symbol for the round. When enough selected symbols land, they expand to fill their reels and are evaluated under the bonus rules.

Spec sheet

Book Of Sirens at a glance.

Identity

Slot nameBook Of Sirens

StudioSpinomenal

Released4/3/2022

Math

SlotRanker Score71

RTP96.14%

Max win5,000×

Bet range$0.10 – $100.00

Player rating3.9 / 5 · 6 votes

Format

Reels5

Paylines10

Layout5x3

Features

Themes

Expected average based on this slot's 96.14% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.54

Cost per session$1.54

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Book Of Sirens? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: Mediumassumed — not published for this slot

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (Medium). The model is calibrated so the average return equals this slot's published RTP (96.14%), with wins capped at its top multiplier (5,000×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Book Of Sirens

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Compare Book Of Sirens with other games

	Book Of Sirens Score 71This game	Tome of the Lost Score 73	Mermaid's Treasure: Book of Pearls - Hold & Win Score 58	Cthulhu Score 55	Book of Xerxes Score 84
Identity
Studio	Spinomenal	Play'n Go	Nucleus Gaming	G.Games	Apparat Gaming
Released	4/3/2022	2/24/2025	11/21/2024	12/9/2021	10/30/2024
Math
RTP	96.14%	96%	—	95.42%	96.11%
Volatility	—	High volatility	—	Low volatility	High volatility
Max win	5,000×	2,000×	—	2,000×	15,000×
Format
Reels	5	6	5	5	5
Layout	5x3	6x5	5x3	5x3	5x3
Paylines	10	Cluster Pays	10	10	262144
Min bet	0.1	0.1	0.1	0.2	0.2
Max bet	100	100	20	20	100
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	—	—	—	✓
Bonus game	—	—	—	—	✓
Respins	—	—	—	—	—

Every number is shown as a delta against Book Of Sirens.

Comparing against

Book Of Sirens

Spinomenal

RTP

96.14%

Max win

5,000×

Score

Mermaid's Treasure: Book of Pearls - Hold & Win

+ Multiplier+ Bonus Game

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