DOCTOR FISCHER OF GENEVA OR THE BOMB PARTY
by Graham Greene; Simon & Schuster; 156 pages; $9.95
Though he set his 20 previous novels in widely different locales, Author Graham Greene has always concentrated on a single terrain: the shadow zone where betrayal meets despair. This moral penumbra may fall across an entire country or bisect a drawing room or a double bed. Ordinary people can pass through it ignorantly and unharmed, save for the occasional grotesque accident. The only ones constantly in jeopardy are the marginal men in a skeptical century, those knowingly burdened...