Book of Sun: Choice by 3 Oaks Gaming puts a fresh twist on the classic “Book” slot formula: you don’t just wait for the feature—you help shape it. When Free Spins hit, you get to choose a Special Expanding symbol, turning the bonus into a more personal (and often more exciting) chase.
Set against a moody, nighttime Egyptian backdrop, this slot is built for players who love straightforward base-game spins, a clear Free Spins objective, and that signature Book-style moment where one symbol can take over the reels. If you’re here to understand how the feature works—and how the “Choice” changes the feel of the game—this guide breaks it down.