Scientology 0-8: The Book of Basics (1970): This is a compilation of scales, codes, creeds, axioms, charts, graphs, and more extracted from 3,000 Scientology lectures and 20,000 pages of LRH's written works. It is primarily a reference work frequently referred to by Scientologists in the course of living. Where a given chart or scale evolved through the years, the book lists each one chronologically so the progression is evident.