The Vanishing Houseboat (Penny Parker Mystery Stories #2)
Author: Mildred A. Wirt
Desc: When Penny and Louise take their friend Laura Blair to apply for a new job they accidentally discover several mysteries. Linda begins work in a boarding house known for strange disappearances. Meanwhile Penny becomes acquainted with Mud-Cat Joe and his family who are homeless ever since their houseboat was stolen. Naturally the two mysteries are connected and Penny is able to help both Laura Blair and Mud-Cat Joe at the same time.