Mary Poppins is a magical English nanny who takes care of four children who live at Number Seventeen Cherry Tree Lane, London. Her best friend is Bert, a cockney who seems to have a number of jobs, including chimney sweep, pavement artist, etc. The character of Mary Poppins is based upon the author's relationship with G. I. Gurdjieff, the Greek Armenian mystic and "teacher of dancing".
The Mary Poppins series of books includes the following titles:
Note that the character in the original book is quite different to Mary Poppins as portrayed by Julie Andrews in the Disney film and that there were only two children, rather than four. Bert was played by Dick van Dyke whose accent in the film is nothing like an authentic English accent.
One source claims that Walt Disney started trying to get the film rights from Travers in 1948 but didn't succeed until 1961.