Get ready to set sail on a terrifyingly funny treasure hunt that combines Geronimo Stilton's two least favorite things in the world: travel and ghosts. When his adventurous sister Thea catches wind of a haunted pirate treasure buried on a remote desert island, she immediately drags Geronimo along for the ride. Before you can even shout a pirate warning, you are plunged into a spooky maritime mystery full of salty sea dogs and spectral surprises. You will follow the Stilton family as they decode ancient clues, explore shipwrecks, and try to avoid whatever phantoms might be guarding the loot. Can Geronimo keep his fur from standing on end long enough to find the gold? This lightning-paced chapter book delivers exactly the right mix of pirate thrills, spooky chills, and laugh-out-loud comedy to hook you from the very first page.