When Mary Poppins is about, her young charges can never tell where the real world merges into make-believe. Neither can the reader, and that is one of the hallmarks of good fantasy.
When Jane and Michael Banks write a job advertisement for a new nanny, Mary Poppins arrives on a gust of the East wind and changes the lives of the Banks family forever. Firm but fair, Mary Poppins takes the children on some truly magical adventures but only until the wind changes again..
This is the book that inspired the 1964 classic film and it is full of adventure and charm.