Book of Parimatch features:
- Mystery symbol. After each spin, the mystery symbols turn into the same symbol. It can be any symbol except for the Scatters;
- Mystery respins. If the mystery symbols appear on the 1st, 2nd, and 3rd reels, the feature activates.
All mystery symbols get locked, and a respin is awarded.
If you hit more mystery symbols during the respin, they lock too, and you get one more respin;
- Free spins. Hit at least three Books of Parimatch, the Scatter symbols, to get ten free spins.
The mystery symbols you hit during the free spin lock as long as the feature lasts. Also, two extra spins are awarded for every reel fully covered in mystery symbols.