Where to begin? CAIN (Conflict Archive on the INternet) along with books from the history shelves are good places to begin.
The Hesburgh Library holds a substantial collection of books on Northern Ireland. Use the catalog to find books on any subject, e.g. search for 'Hume Peace Ireland' will find a list of books relating to John Hume and Peace.
Additionally, the Library holds primary sources, microform collections, subscribed online sources, and films on Northern Ireland. Below is a guide to those resources.
The following are some of the materials in the Rare Books and Special Collections of Hesburgh Libraries:
The Ronald Wells Collection on Peace and Reconciliation in Northern Ireland
Reports, publications and correspondence of organizations, mostly religious, relating to peace and reconciliation in Northern Ireland. The materials were gathered in the course of research by Dr. Ronald Wells.
Thomas Bartlett Northern Ireland Collection.
A large collection of books, pamphlets and some other materials, including a rubber bullet, from the early 1970s in Northern Ireland, were given to the Library by Thomas Bartlett, Most of the books and pamphlets may be identified by searching the catalog for 'Thomas Bartlett Northern Ireland Collection', and the rubber bullet and ephemeral items are in collection MSE/IR 1108.