Book excerpt: "Natalie Natalia"?is Nicholas Mosley's brilliant examination of political life. It revolves around Anthony Greville, a conservative Member of Parliament who is tormented by his ambivalence toward his career, by his religious doubts, and by his adulterous affair with Natalia Jones, the enigmatic wife of a colleague. The course of their affair dramatizes love in its most creative and perilously destructive aspects, the two facets symbolized in the two names he has for his lover: "I sometimes called Natalia Natalie instead of Natalia," Greville says, "when she was the ravenous rather than the angelic angel... What Natalie said was often a code for what Natalia was meaning." Ranging in setting from England to Central Africa, the novel is a remarkable investigation of ethics, with fiction itself as an ethical activity.