The DMT Handbook presents a step-by-step Acid/Base tek for the extraction of DMT using Acacia obtusifolia bark as the source material. It also includes detailed descriptions of the methods of purification and recrystallization, instructions on the production of DMT enhanced leaf (colloquially known as changa[1]) and details of various methods of ingestion. It was originally developed from the LexTek method by Viracocha and uploaded to the site in December 2008 before being added to the wiki by Amor Fati in February 2009.