The Dungeon Books of Battle Mats are a pair of modular Battle Map Books that combine to give you up to an epic 2’x2’ encounter battle mat while still fitting in your bag and on your bookshelf alongside your rule books. Modular designs line up seamlessly to allow you to form a dungeon for any encounter! Hundreds of combinations, size and shape options, all wipe clean and fully customisable for your adventure.
https://www.kickstarter.com/projects/gamingbooks/the-dungeon-set-of-2-modular-books-of-battle-mats