The Aldens are going on vacation and decide to buy a houseboat. As they journey down the river, they have a feeling of being watched. Little do they know, the person will stop at nothing to get their hands on their boat.
| Houseboat Mystery | |
|---|---|
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| Book Number: | 12 |
| Publication Date: | 1967 |
| Plot Synopsis: Floating down a lazy river, Benny finds a blackmail scheme in progress | |