Born in Dublin in 1956 and brought up in Goatstown, Marita went to school at the Convent of the Sacred Heart, Mount Anville, later working in the family business, the bank, and a travel agency. She has four children with her husband James, and they live in the Stillorgan area of Dublin.
Marita was always fascinated by the Famine period in Irish history and read everything available on the subject. When she heard a radio report of an unmarked children's grave from the Famine period being found under a hawthorn tree, she decided to write her first book, Under the Hawthorn Tree.
Published in May 1990, the book was an immediate success and become a classic. It has been translated into over a dozen languages, including Arabic, Bahasa, French, Dutch, German, Swedish, Italian, Japanese and Irish. The book has been read on RTÉ Radio and is very popular in schools, both with teachers and pupils. It has been made a supplementary curriculum reader in many schools and is also used by schools