A POET’S novel — fantastic, dreamlike, filled with sudden gritty details, with grave ecstasy and triumphant despair. The Conspirators has Lisbon for its locale and the agents and castaways of battling Europe for its characters. Personal as well as political vengeance motivates the melodramatic killing of the traitor who obligingly identifies himself by wearing a red carnation. The suspense is achingly drawn out. This is a book for readers who like dreamy horror and prose for its own sake.