From the back of the book: I'm admiring the camper trailer - it's as streamlined and silvery as a rocket ship - when the side door of the house opens and a girl about my age comes out. Her reddish-gold hair is in a bouncy ponytail that catches the sunlight. A roly-poly dog waddles behind her. I freeze, expecting suspicious questions about who I am and what I'm doing in the driveway... What if you suddenly found yourself in Maryellen's world of the 1950s? Together, you and Maryellen could go to a sock hop, enter a contest, or take a road trip in the camper. As you read, you decide what happens next by choosing your own path through this multiple-ending story.