While the internet has made tracing family trees easier, advanced research requires more sophisticated references. Accordingly, Grenham (fellow, Irish Genealogical Research Soc.; Genealogical Society of Ireland) fills Tracing Your Irish Ancestors with research notes and access points, updated to include online sources. The introduction and early chapters aid beginning researchers, with more detailed material for experienced users in the later sections. With How To Find Your Family History in U.S. Church Records, Morton (editor, Family Tree Magazine) and board-certified genealogist Henderson compile links and addresses for “surprisingly neglected” Christian resources. Novice genealogists will especially benefit from tips about querying living relatives, reading handwriting, and teasing complex explorations from surface information. VERDICT Consider for libraries with significant patron interest in Irish and Christian genealogy sources.