- Vol I "The Thayer - Tayer - Theyer Families of Gloucestershire, England 1500 - 1660"
- Vol II "Descendants of Nathaniel Thayer Immigrant to America 1660" Photo Index
- Vol III "Descendants of Richard Thayer Immigrant to America 1641" Through his Grandson, Richard3-2-1 Photo Index
- Vol IV "Descendants of Richard Thayer Immigrant to America 1641" Through his Grandsons, Nathaniel3 (Richard2-1) and Cornelius3 (Richard2-1) and His Son Nathaniel
- Vol IV -b "The Thayer Families of West Virginia and Maryland Including the Ancestors and Descendants of Abel Thayer (1740/41 - 1814) from 1500 to 2016
- Vol V "Descendants of Thomas Thayer Immigrant to America 1637" Through his son Thomas2 and Grandsons Jonathan3 (Ferdinando2) and Thomas3 (Ferdinando2)
- Vol VI "Descendants of Thomas Thayer Immigrant to America 1637" Through his son Ferdinando2 and His Grandsons Samuel3 and Josiah3 (Ferdinando2) Photo Illustrations
- Vol VII "Descendants of Thomas Thayer Immigrant to America 1637" Through his Grandson Isaac and first wife, Mercy Rockwood
- Vol VIII "Descendants of Thomas Thayer Immigrant to America 1637" Through his Grandson Isaac and second wife, Mary
- Vol IX "Descendants of Thomas Thayer Immigrant to America 1637" Through his Grandsons, Ebenezer3 & Benjamin3 (Ferdinando2) Thayer
- Vol X "Descendants of Thomas Thayer Immigrant to America 1637" Through his Grandsons, Samuel3 & William3 (Shadrach2) Thayer