Patty enters a contest and wins an electric car, which she names The Swift Camilla. Then she and her family decide to buy a summer home on the beach. All of Pattys friends come up for a visit. Patty turns 19 in this book. Shes still not socially considered an adult, but her relationships are starting to get slightly more complicated. First appearance of Mona Galbraith. Pattys Motor Car is the ninth novel in the series of Patty Fairfield for young readers by the famous author Carolyn Wells. Carolyn Wells (1862-1942) was an American poet and writer of detective and mystery novels, as well as childrens books, best known for her Fleming Stone Detective Stories. After 1910, she devoted herself to the mystery genre.