Narcotics Anonymous NA Symbol Double Book Cover. Narcotics Anonymous DELUXE Double Book Cover with NA Circle Diamond Symbol for the Basic Text 6th Edition & It Works How and Why Hardcover Books. This beautiful cover is made of a durable leather-like expanded vinyl and comes with NA Circle Diamond Symbol, medallion holder, heavy-duty snap, book marks, and a pen holder. These come in several colors: choose from pink, brown, green, burgundy, blue, red, black, tan, purple. Medallion and Books NOT included. MADE IN THE U.S.A.