The Secrets of Droon #7: Into the Land of the Lost

A hidden door. A magical staircase. Discover the world of Droon! Aha! Lord Sparr has put Princess Keeah under a magic spell. Eric, Julie, and Neal can help her if they go to the Land of the Lost. But only ghosts live there. And if they don't get out soon, the kids will turn into ghosts themselves!