For now, however, all it takes is a visit to the Internet where, for thirty dollars plus shipping, I purchased a thick how-to book called Secrets of Methamphetamine Manufacture. The revised and expanded sixth edition of “the classic text on clandestine chemistry” has a disclaimer on the title page: “sold for informational purposes only.” This information includes step-by-step instructions on manufacturing a variety of forms and quantities of meth, plus advice about evading law enforcement.