He has written 26 books, several monographs and magazine articles, including many standard works on Anglo-American genealogy.
The Complete Book of Emigrants, 1607-1660
The Complete Book of Emigrants, 1661-1699
The Complete Book of Emigrants, 1700-1750
The Complete Book of Emigrants, 1751-1776
The Complete Book of Emigrants in Bondage, 1614-1775
Supplement to The Complete Book of Emigrants in Bondage, 1614-1775
American Migrations 1765-1799. The lives, times, and families of colonial Americans who remained loyal to the British Crown before, during and after the Revolutionary War, as related in their own words and through their correspondence
Child Apprentices in America from Christ's Hospital, London, 1617-1778
The Bristol Registers of Servants Sent to Foreign Plantations, 1654-1686
Emigrants from England to the American Colonies, 1773-1776
Emigrants in Chains. A Social History of Forced Emigration to the Americas of Felons, Destitute Children, Political and Religious Non-Conformists, Vagabonds, Beggars and Other Undesirables, 1607–1776
English Adventurers and Emigrants, 1609-1660. Abstracts of Examinations in the High Court of Admiralty with Reference to Colonial......