Lola Montez, the protagonist of Basic Black with Pearls by Helen Weinzweig, is a woman gripped by an obsessive, consuming passion for her married lover, Coenraad. To hear Lola tell it, this mysterious man, who works for an unspecified outfit referred to only as “The Agency,” directs her to their assignations by means of a secret code he embeds into the text of National Geographic magazine articles.