judul asli : sei nella lava al collo, Stiltonut! ; Geronimo Stiltonoot and his family are off to find a cure for Grandma Ratrock's aches and pains. She's heard that remedy hides in Cheesy-La, a legendary valley that Geronimo isn't even sure exists. Little does he know that greeting there will be an adventure among geyers, volcanoes, and rivers of molten lava.