These are detailed and in-depth sessions on specific sections of the Big BookThe basic text of AA was the first to methodically introduce the 12-steps. It is still the main source for meetings and is quoted in just about all AA and other 12-step literature. the Library of Congress named it one of the 88 “Books that shaped America.” Read more about the Big Book of AA. of AA. Usually, part of a chapter is read and then discussed.