Jenny Oldfield (born 8 August 1949) is an English author who wrote Definitely Daisy, Animal Alert, Home Farm Twins, the Half Moon Ranch series and other pony books.
Oldfield went on to study English at Birmingham University, where she did research on the Bronte Novels and on Children's Literature.
She loves the countryside and enjoys walking, gardening, playing tennis, riding and travelling with her two daughters, Kate and Eve.
Furthermore, Kirstie cannot bear to see horses be abused and mistreated and in some of the books goes to extreme lengths to prevent this occurrence.
[citation needed] She was also involved in the Animal Ark series, writing, along with several other authors, under the name Lucy Daniels.