The Outdoor Girls In A Motor Car is a young adult novel by Laura Lee Hope, originally published in 1913. It is the seventh book in the "Outdoor Girls" series. The story follows four teenage girls, Betty, Mollie, Grace, and Amy, who go on a road trip in a motor car with their friend Frank. Along the way, they become embroiled in a mystery surrounding a supposedly haunted mansion in Shadow Valley. The girls work to solve the mystery and help a family in need while also enjoying the adventure of their road trip. The book includes themes of friendship, bravery, and problem-solving.