By Fergus Kelly.
Dublin: Dublin Institute for Advanced Studies, 1988.
Includes the contents of texts in both Irish and English as well as plates showing the primary source documents themselves. Subdivided by topic, the book is well laid out and easy to work with. A guide to pronunciation, a glossary of Irish terms and other lists and indexes make this work an excellent source for those new to the subject.
By T.M. Charles Edwards.
Cardiff: University of Wales Press, 1989.
This is not a collection of primary source documents on the subject but instead a history and criticism of the law in Wales prior to the Modern era.