Geronimo Stilton's ancient ancestor Geronimo Stiltonoot is back in another prehistoric adventure! Geronimo 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 Cheesy-La, a legendary valley that Geronimo isn't even sure exists. Little does he know that getting there will be an adventure among geysers, volcanoes, and rivers of molten lava!

Geronimo Stilton meets the Stone Age in this bestselling spin-off series! Geronimo Stiltonoot is off to find a cure for Grandma Ratrock's aches and pains. He's heard that a remedy hides in a mysterious distant valley, but he's sure that he'll be back home in no time. Little does he know that his journey will becomean adventure among geysers, volcanoes, and rivers of molten lava!

"Old Mouse City is in an uproar. The most precious artifact in the mouseum -- the Stone of Fire -- has been stolen! Geronimo Stiltonoot and his cavemouse friend Hercule Poirat are on the case. It's up to them to retrieve the stone from the ferocious Tiger Khan and his band of fearsome felines!"--Page 4 of cover.

Geronimo Stilton's ancient ancestor Geronimo Stiltonoot is back in another prehistoric adventure. Geronimo 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.

Geronimo Stilton's ancient ancestor Geronimo Stiltonoot is back in another prehistoric adventure. Geronimo 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.

When you're with me, Geronimo Stilton, it's always a fabu-mouse adventure! Sally Ratmousen broke some shocking news: The Rodent's Gazette was out of money and in danger of closing. Then Grandfather William broke even worse news to me: I needed to sell my comfy, cozy house in order to save our paper! How terrible! But could I sell it -- and find a new home -- in time to help?