Stephanie Owen Reeder grew up on the northern beaches area of Sydney. She attended the University of Sydney, gaining a BA with a major in History and honours in Indonesian and Malayan Studies. She also attained a Diploma in Education, and subsequently taught English, history and languages at secondary schools in Sydney during the early 1970s.
Following a move to Canberra in 1975, Reeder completed a Graduate Diploma in Librarianship. She went on to complete a Masters in Education before taking up work as a Hansard editor at Parliament House, Canberra. She also has a PhD in Communication.
Reeder has published children's books and has written articles and reviews relating to children's literature. During 1986 and 1987 she was editor of Reading Time, the journal of the Children's Book Council of Australia. In her 'retirement', Reeder continues to write and publish for children. She has also worked as a freelance editor, writer, and reviewer.