Geronimo Stilton Cavemice #3: Help, I'm in Hot Lava!

Geronimo’s ancient ancestors have a spot of bother of the hot, deadly kind. Holey cheese. Colour pictures, mind-blowing danger and super Stone Age chuckles. 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 involve boiling geysers, volcanoes and rivers of molten lava…