She wrote two series of the ATV series Starting Out (19), made to be shown in schools. It's not something right outside themselves and this immediately puts it, not only into their comprehension, but it also gives them a degree of power'. On the subject, she writes: 'We should show them that evil is something they already know about or half know. Storr's books often involve confronting fears, even in the lighthearted Polly stories, and she was aware that she wrote frightening stories.

It was made into the TV series Escape Into Night and the film Paperhouse Storr was not fond of the latter, and particularly disliked the ending. A novel for slightly older children Marianne Dreams (1958) is more disturbing: a young girl, being tutored at home during sickness, travels in dreams to the house she has drawn while awake and meets there another pupil of her tutor in a moment of jealousy she draws stones with eyes around the house to keep him prisoner and must then undo her actions. The stories, starting with the collection Clever Polly and the Stupid Wolf (1955), feature a wolf trying to catch a little girl: the wolf, himself a fairy tale figure, takes his always impractical subterfuges from fairy tales, but is outmatched by Polly every time. Unusually among the leading children's writers of her time, much of her work was for younger children, at the start of their reading, notably the series of stories about Polly and the wolf, which were written for her daughter, Polly. She died at her London flat in January 2001. Storr continued writing novels into her eighties. She later married the economist Lord Balogh (1905–1985). They had three daughters, Sophia, Polly and Emma, but divorced in 1970. She had met the psychiatrist and author Anthony Storr (1920–2001) during her training and married him in 1942. Afterwards, while regularly producing children's books, she also worked as an editorial assistant for Penguin Books from 1966 to the early 1970s. From 1950 to 1963 she acted as a Senior Medical Officer in the Department of Psychological Medicine at the Middlesex Hospital. Without giving up this ambition, she studied medicine, qualifying as a doctor in 1944.

She went on to study English literature at Newnham College, Cambridge, and at first pursued a career as a novelist without success. She attended St Paul's Girls' School, where she was taught music by Gustav Holst and became the school's organist.

She was born in Kensington, London, one of three children of a barrister, Arthur Frederick Andrew Cole (1883–1968), and his wife, Margaret Henrietta, born Gaselee (1882–1971). She also wrote under the name Helen Lourie. Catherine Storr, Baroness Balogh (born Catherine Cole 21 July 1913 – 8 January 2001, ) was an English children's writer, best known for her novel Marianne Dreams and for a series of books about a wolf ineptly pursuing a young girl, beginning with Clever Polly and the Stupid Wolf.

Marianne dreams