The first of P.L. Travers's novels about the magical nanny, Mary Poppins.
When Katie Nana, the much-tried nanny to the Banks family of 17 Cherry Tree Lane, finally storms out in a huff, the wind blows in Mary Poppins and her carpetbag. The Banks children find that Mary Poppins is stern, vain, and usually cross – but also has a touch of magic about her.