By P.L. Travers, the author featured in the upcoming movie "Saving Mr. Banks." Who can slide "up" banisters, banish naughtiness with a swift "Spit-spot," and turn a make-believe sidewalk drawing into a lovely day in the park? Mary Poppins, of course! From the moment the beloved nanny arrives at Number Seventeen Cherry-Tree Lane, everyday life for the Banks family is full of excitement. This box set features three adventures in paperback: "Mary Poppins," "Mary Poppins Comes Back," and "Mary Poppins Opens the Door." "By P.L. Travers, the author featured in the upcoming movie "Saving Mr. Banks." Who can slide "up" banisters, banish naughtiness with a swift "Spit-spot," and turn a make-believe sidewalk drawing into a lovely day in the park? Mary Poppins, of course! From the moment the beloved nanny arrives at Number Seventeen Cherry-Tree Lane, everyday life for the Banks family is full of excitement. This box set features three adventures in paperback: "Mary Poppins," "Mary Poppins Comes Back," and "Mary Poppins Opens the Door." "