Mandie and the Invisible Troublemaker
A new school term is beginning, and Mandie is saddened to learn that the Misses Heathwood have put the school up for sale. Then a mysterious troublemaker begins pulling pranks--and making it look as though Mandie is to blame! It will take all Mandie's sleuthing skills to get to the bottom of it.

Mandie and Her Missing Kin
Visiting her friends at the Woodards in Charley Gap, Mandie is eager to see her father's old log cabin, where she used to live before her father died. It appears run-down and deserted--until she sees smoke coming from the chimney and a face peeking out the window. Who could be living there?

Mandie and the Schoolhouse's Secret
When Mandie is exposed to the measles, Grandmother Taft keeps her out of school until they know for sure she doesn't have the disease. Mandie doesn't like missing out--especially with all the construction to modernize the school building going on. Surely there's a mystery to investigate!