It's the middle of the night when Jeff spots someone dumping a large bundle into the lake. It's too dark to identify anyone -- or anything. But the cousins immediately suspect foul play, and plunge ri
When a girl's face appears, then disappears, outside a window of their spooky old schoolhouse, the cousins think they've seen a ghost. More strange clues -- piano music lilting through empty halls, a
Jeff, David, and Claire love their winter break jobs at the ski chalet on Blue Mountain, where they get to snowboard and go sledding between shifts of cleaning and tending to the grounds. But when thi
During summer vacation the cousins are excited to visit their grandparents on Hidden Horse Ranch. They get to sleep in a bunkhouse, swim in a pond with a rope swing, and ride horses any time they want
The cousins discover a mysterious stranger sneaking into the local dump. When bikes, toasters, and other items disappear all over town, they begin to suspect he might be up to no good. But when these
Lost Island was off limits -- until now. Jeff and David are going to the desert island to search for clues. And hidden treasure! Town legend tells of a robber and a secret cave, but the brothers have
When a camper disappears from the dangerous lookout at Skull Cliff, the cousins wonder if it is the old town curse at work. Then the police discover a ransom note, and everyone is in search of a kidna
