In 1990, Sheila co-authored a book about legal structures used in settler societies:
Israel and South Africa: Legal Systems of Settler Domination, by Sheila Ryan and Donald Will, Africa World Press (May 1990)
A number of people have commented on the importance of this book, despite the relative obscurity of the specialty press that distributed it:
(Cited in Worlds of Hurt: Reading the Literatures of Trauma, by Kalí Tal.)