Letters from Camp: A Mystery Chapter Book for Children (Ages 8-12) about Brothers, Sisters, and Camp Secrets

Mom and Dad,
You've got to get us out of here! When you get this letter, COME IMMEDIATELY!
-- Charlie

The brother-sister pairs who arrive for the summer at Camp Happy Harmony are almost too busy fighting with each other to notice how strange the camp really is. Not only are the campers forced to wear bizarre uniforms, eat gross food, and do chores all day, but the members of the family that runs the camp fight constantly--with each other. Are the campers in danger? Or--in spite of sibling wars--do they need to stick together to solve the mystery humming under the surface of Camp Happy Harmony?