Thirteen-year-old Jon and his eleven-year-old sister, Tania, are typical kids—except Tania can communicate with ghosts. Their parents also happen to be the producers of a ghost-hunter television show—and have no idea one of their own kids can see ghosts. In The Ghost on the Stairs, the brother-sister duo join forces to help reunite a newlywed couple from beyond the grave. In The Riverboat Phantom, Jon and Tania try to help the ghost of a steamboat worker find peace at last—and find more than they bargained for on the river!