While maintaining his resource's foundation as part guidebook, part source list, and overall comprehensive guide to navigating records, repositories, and techniques on all aspects of Irish genealogy, Grenham (Irish Times Ancestors website) now better represents the proliferation of Irish genealogical resources available online. While the third edition referenced websites as just one element of an Irish family history project, this edition acknowledges them as a central feature of today's genealogical research, heavily incorporating websites (and tips for using them) in every chapter. The introduction has been expanded to include a guide on how to find and use key sites during various points of research, and a chapter dealing specifically with Internet research has been reworked with new and updated information. Individual chapters devoted to key record types such as census, vital, property, and church records and other important sources have been updated with frequent references to useful online resources. An enlarged source list section is organized by county and record type, and lists, for example, books, journals, websites, and record indexes. A comprehensive list of known Roman Catholic parish registers is organized by county and accompanied by tables and maps referencing parish locations, record types, date ranges, and repository locations. Notably, for the first time, an index has been added. VERDICT Already an essential reference work for anyone researching Irish ancestors, this new edition is recommended especially because of its expanded and updated information on finding and using online resources to research Irish roots.-Jean Fisher, Tacoma P.L., WA (c) Copyright 2012. Library Journals LLC, a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.