From the moment Otis and Cody Carson arrive on Skull Island to stay at their aunt's inn, they know something is wrong. A giant snake turns up on their aunt's bed, one of the rooms is violently ransacked, and then a celebrity guest goes missing. Could a ghost be responsible—or pirates?

Otis, Cody, and Rae are thrilled to fly down to the Amazon, where the twins' dad has a commission to paint a portrait of coffee baron Enrico Estevez. But then a speeding car tries to run down Mr. Estevez and an overnight stay in the jungle turns terrifying when the kids encounter deadly animals…and even deadlier smugglers.

A trip to the Rockies to snowboard? Cool. Hanging out with champion snowboarders on the mountain? Really awesome! When twins Cody and Otis Chandler, along with their cousin Rae, join their dad at the Shadow Mountain Lodge, they're expecting a relaxed vacation. But after a series of strange and dangerous “accidents” aimed at two rival snowboarders, the twins set out to discover what's going on—before someone gets killed.

city of light, catacombs, pastries…and art thieves? When Cody and Otis Chandler, their father, and their cousin Rae journey to France, they discover that there's a crime wave going hundreds of paintings have been stolen and replaced by forgeries. When the thief snatches their dad's painting, the twins can't resist getting involved. Will they find out the truth before it's too late? The ending involves a chase scene through the Paris catacombs—plenty of dead ends, skulls, danger, and…rats!