Unearth ancient treasures deep within Egyptian tombs in Secret Book of Amun Ra, a classic 'Book of' style slot by Booming Games. Set against a backdrop of hieroglyphics and golden artifacts, the game features a familiar 5x3 reel structure and 10 fixed paylines. Landing three or more Book scatter symbols triggers the highly anticipated free spins round, where a special expanding symbol is randomly chosen to cover entire reels, leading to significant winning potential. This iconic mechanic offers thrilling gameplay as players chase the full screen of premium expanding symbols.