Geronimo Stilton's ancient ancestor Geronimo Stiltonoot is back in another prehistoric adventure!u003cbru003eu003cbru003eGeronimo Stiltonoot and his family are off to find a cure for Grandma Ratrock's aches and pains. She's heard that a remedy hides in a legendary valley, and Geronimo isn't even sure it exists. Little does he know that getting there will be an adventure among geysers, volcanoes, and rivers of molten lava!
