The Internet Archive discovers and captures web pages through many different web crawls. At any given time several distinct crawls are running, some for months, and some every day or longer. View the web archive through the Wayback Machine.
books.google.com - Brings together the essential findings of recent research in a fresh and readable way. This momumental and classic work has been updated by a team of respected scholars. The bibliography has also been revised. Companion volume: A History of Christianity, Volume I: Beginnings to 1500....https://books.google.com/books/about/A_History_of_Christianity_Volume_II.html?id=FRotzA6ijioC&utm_source=gb-gplus-shareA History of Christianity: Volume II