Mastering Immigration & Naturalization Records (Quillen's Essentials of Genealogy)
W. Daniel Quillen is the author of "Secrets of Tracing Your Ancestors" and "The Troubleshooter's Guide to Do-It-Yourself Genealogy," as well as the series of genealogy primers (of which there will be six by Fall 2012) in the series Quillen's Essentials of Genealogy.