"When Seth and Julia are approached by a secretive man and asked to solve a decades-old scavenger hunt, they accept. But they're not the only detectives the man has recruited for this Waldameer mystery. Can Seth and Julia find the treasure before the team of cheaters? Who is the mystery man, and why does he always wear a disguise? The latest Waldameer mystery sends Seth, Julia, Bek, and Semira on a puzzling race as they compete to solve the curious...

"Siblings Seth and Julia practically live at Waldameer, the local amusement park, during the summer. While showing their friends around the park, they find an old locket near the carousel. How long has the locket been lost, and what's the photograph inside it? Most importantly: whose locket is it Their quest to find the locket's owner unearths Waldameer history in the process. Follow Seth, Julia, Tyren, and Anh as they search for clues, outsmart bullies,...