The Fallout Bible is a collection of documents containing background material for the first Fallout games. They were compiled, written and released by Chris Avellonein 2002 on a semi-regular basis. According to Avellone, however, the Bible is no longer considered canon.
The Fallout Bible (complete) by Chris Avellone 2016-01-29
Gospel of Fallout creation and lore from the original developer