Christianna Brand was born Mary Christianna Milne (1907) in Malaya but spent most of her childhood in England and India. She had a number of different occupations, including model, dancer, shop assistant and governess. Brand also wrote under the pseudonyms Mary Ann Ashe, Annabel Jones, Mary Brand, Mary Roland, and China Thompson. Christianna Brand served as chair of the Crime Writers’ Association from 1972 to 1973.
About the Novel : They concern a hideously ugly witch known as Nurse Matilda who has been highly recommended to Mr. and Mrs. Brown as a nursemaid by several agencies. Nurse Matilda arrives at the household of the Brown family and becomes a nanny to the innumerable Brown children. The Brown children are “exceedingly naughty” and frighten off many governesses in wonderfully mischievous ways — until Nurse Matilda comes. She teaches the children to behave, and deals with the fearsome and pernickety Great Aunt Adelaide Stitch. In the end the children become good and decent, and Nurse Matilda leaves to attend another family of naughty children.
But at the end of the story the kids starts loving Nurse Matilda but she has to follow her rules
When you need me, but do not want me, then I must stay. When you want me, but no longer need me, then I have to go.”