Entry rule
Three Books now—or ninety-nine over time.
Landing three or more Book wilds anywhere awards ten Free Spins at the stake used for that spin. Completing the collection also awards ten, but the stake is derived from the collection history.
VerifiedThe feature can retrigger: three or more Books during Free Spins add another ten spins.
What happens next
The game chooses
One of the nine regular symbols becomes the special expanding symbol for the whole feature.
Normal wins settle
Each free spin first evaluates ordinary line wins, with the Book still acting as wild.
Expansion checks
Two matching high symbols or three matching low symbols can qualify the special symbol to expand.
All lines are read
Reels containing the selected symbol expand; the special payout can use all ten lines without the normal adjacency rule.
Expanding symbol lab
Build a feature screen
Tap the grid to place the selected special symbol. This visual explains the expansion rule; it does not reproduce game odds or outcomes.