About the Book of Sirens game
Book of Sirens is a Greek mythology-themed video slot from Spinomenal, played on 5 reels and 3 rows with 10 fixed paylines. Its book format combines left-to-right line wins with a dual-purpose Scatter Wild, 10 free spins, a randomly selected Expanding Symbol, and an optional Buy Feature.
Paylines, Scatter Wild and Free Spins
Winning combinations are evaluated from left to right, starting on the leftmost reel. Only the highest win on each payline is paid; its value is multiplied by the bet per line. Regular symbols include card ranks, two sirens and sea creatures.
The book is both a Wild symbol and a Scatter symbol. As a Wild, it substitutes for regular paying symbols. Three, four, or five books anywhere on the reels award 2x, 25x, or 250x the line bet, respectively. Three or more also activate the free spins feature and provide 10 free spins.
Once triggered, a wheel containing all regular symbols except the book selects the round’s Expanding Symbol. During the free spins, the chosen icon expands across its entire reel after the result is determined, but only if this creates a win. It can form additional winning paylines. Further combinations of at least three books can retrigger the feature with 10 additional free spins.
The optional Buy Feature gives direct access to the free spins round where permitted. Availability and purchase conditions vary by casino, market, or jurisdiction.
RTP, Maximum Win and Mythological Presentation
The specification lists RTP configurations of 88.94%, 91.71%, 93.96%, and 96.14%. The active version can vary by operator, market, or jurisdiction and should be checked in the current paytable. RTP is a theoretical long-term return calculated over a very large number of game rounds, not a guaranteed result for one session.
The published maximum win is 5,000x the total bet. The official specification does not include a volatility rating or hit rate, so external classifications should not be treated as confirmed provider data.
Book of Sirens presents its oceanic theme through alluring sirens, mythical sea creatures, ancient books, card symbols, deep-blue water, and an underwater setting. The game supports mobile play as well as desktop browsers.
This 5-reel online slot suits players who enjoy classic book mechanics, fixed paylines, and free spins with an expanding symbol. The selection wheel, retriggers, four RTP options, and optional Buy Feature add variety to the familiar structure.
