Geronimo Stilton (老鼠偵探) #16: A Cheese-Colored Camper (英文版)

Geronimo's grandfather William Shortpaws is back at The Rodent's Gazette, and he wants to write a cheesy guidebook on Ratzikistan, a frozen tundra if ever there was one. Only Cheap Mouse Willy (as he is sometimes called) doesn't want to do the research -- but he know just the mouse to do it.