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Book of Stars by Greentube is a five-reel, 25-payline slot with a medium-high volatility range and an RTP of 95.16%. The game uses a mythic, cosmic theme with ancient-style symbols, including A, K, Q, J and 10, alongside themed icons such as a book and a gilded figure. The Book symbol also acts as a wild substitute in standard play.
Landing three or more scatter symbols triggers 10 free games. In the bonus round, one symbol is chosen to expand across three positions on a reel and can appear across all lines played. The paytable shows wins for three, four or five matching symbols, while the interface includes autoplay, collect, gamble and paytable options.
This demo version lets players play for free and study the rules before playing for real money. It also shows the betting range, from 0.25 to 100, and the fixed-line structure on the reel set. The layout presents the game in a classic video slot format with bonus features centred on free spins and the gamble round.
