Here is the list which I keep on hand. I have consulted the first three of the Irish-oriented ones and the predecessor edition of the Szucs book, an absolute "must" for serious research in the U.S. The other two are recommended by a family historian who started her Irish research in this century. Sharon Carberry Georgia Irish records : sources for family and local history Ryan, James G. ISBN 0916489760 Tracing your Irish ancestors : the complete guide Grenham, John ISBN 0806313692 Radford, Dwight A. & Kyle J. Betit, Discovering Your Irish Ancestors 2001 Ouimetter, David S., Finding Your Irish Ancestors: A Beginner's Guide 2005 Quillen, Daniel W., Secrets of Tracing Your Ancestors 2005 Szucs, Loretto Dennis The source : a guidebook of American genealogy Rev. ed. 1996