Henry, Jessie, Violet, and Benny Alden are spending the summer on a houseboat Throughout the journey, the children have the feeling they are being watched--and they are. Someone wants something on their boat, and he'll stop at nothing to get it. Can the Boxcar Children figure it out before it's too late? Graphic Planet is an imprint of Magic Wagon, a division of ABDO Group. Grades 2-4.