Eleven-year-old Casper Tock hates risks, is allergic to adventures and shudders at the thought of unpredictable events. So, it comes as a nasty shock to him when he accidentally stumbles into Rumblestar, an Unmapped Kingdom full of magical beasts. All Casper wants is to find a way home, but Rumblestar is in trouble. Can he, the unlikeliest of heroes, save the Unmapped Kingdoms? 8+ A whole new world is waiting to be discovered.