PSI Giant Book of Battle Mats Revised Board Game is the massive tome of maps for fantasy tabletop role-playing games. The maps are fully compatible with wet/dry markers, which means that the maps can be modified and adjusted to reflect the encounter. A 1-inch grid allows for easy tactical planning for combat encounters, while detailed artwork will immerse any encounter in the environment. The innovative 360° spine allows the book to be folded in half so each map page can be used individually - perfect for random encounters and small tables! of course, the book also lays flat to allow for companion facing pages to create an epis, immersive battle map.