The Map of Me (Google eBook)
The note Momma left on the fridge says only: "I HAVE TO GO." But go where? Twelve-year-old Margie is convinced that Momma's gone to the Rooster Romp at the International Poultry Hall of Fame, in search of additions to her precious flock of chicken memorabilia. And it's up to Margie to bring her home. So she commandeers her daddy's Faithful Ford, kidnaps her nine-year-old sister, Peep, and takes to the open road.