Designed with the busy student in mind, this second edition provides a concise and accessible overview of the core principles and concepts in Irish constitutional law. The book has been updated to include changes to citizenship requirements and the effects of a finding on unconsitutionality. The text also outlines evolving case law in the area of fundamental rights and the separation of powers. New cases discussed include A. v. The Governor of Arbour Hill Prison (2006), N. v. Health Service Executive ("Baby Ann case") (2006), Zappone and Gilligan v Revenue Commissioners (2006), and C.C. v Ireland (2006). The effects of the incorporation of the European Convention on Human Rights are highlighted throughout.