Book of Books

The Book of Books, developed by Yggdrasil, is a Video Slot that draws inspiration from a mysterious medieval group called the Peregrin, tasked with safeguarding the elusive "Book of Books." This game is structured with a grid consisting of 5 reels and 3 rows, featuring 10 fixed paylines that can expand to either 5×4 or 5×5 during the Free Spins round, resulting in 20 or 40 paylines. When two Scatters appear in the main game, the PowerUp Collection feature activates, allowing players to store a random PowerUp for the upcoming Free Spins, which may include additional Free Spins, an extra Expanding Symbol, or a multiplier of x1 or x2. To initiate the Free Spins round, players need to land three or more Scatters, with the number of Scatters determining the grid size: three Scatters create a 5×3 grid, four yield a 5×4 grid, and five generate a full 5×5 grid. Players start the Free Spins with seven spins, during which all PowerUps collected in the main game are triggered. Each Free Spin features a randomly chosen Expanding Symbol; if it appears in sufficient quantity, the entire reel expands, leading to distinctive payouts. Wild symbols can help complete standard combinations but do not substitute for Scatters. A Golden Bet option is offered, increasing the stake and improving the chances of triggering the Free Spins round. In some regions, a Bonus Buy feature is also available, providing immediate access to the Free Spins rounds with set Scatter counts and grid sizes. The game offers a maximum potential win of up to 10,000 times the bet.

You can play it for real money.