Title: The mystery of Plum Park pony
First published: 1980
Description: Searching the amusement park for a pony only Susan has seen, Susan and Kent track it to the Tunnel of Terror. As they realize the pony is trapped inside, the train begins its test run.
Subjects: Horses, Amusement parks, Mystery and detective stories, Fiction
LC classification: PZ7.H1458 Mx