"Audrey and Oliver collect many treasures--and mini adventures. For every dangerous hike up a rocky cliff, there's a waterfall roaring back down. Each dungeon hides a treasure chest--but also a monster spawner! As the mobs get deadlier, the stakes grow higher. The twins hope to make it back to Birchtown with their treasures in hand. Will the next ravine lead to riches or a river of hot lava?"--