Bobbsey Twins on a Houseboat

The Bobbsey family are are staying on a houseboat for summer vacation! At first all seems to be going well - what with fishing, playing with friends, and exploring the river. But then a mean farmer arrives, who seems determined to stop the trip. Why? Where has Will Watson, his mistreated hired boy, run away to? Who is stealing food from the houseboat? Who or what made the strange noises the cook heard? And can the twins solve the mystery? - Summary by Summary by Rachel