Carlos Fuentes, Mexico's leading novelist, author of The Old Gringo , Terra Nostra and The Death of Artemio Cruz , has produced what is probably the first Third World spy thriller, an action-filled, quick-paced novel of intrigue as contemporary as a headline. The Hydra Head has a constant political reality as backdrop: the permanent tension in the Middle East and the vast new oil resources of Mexico, the setting for a brilliant attempt to portray the diversity of one man's experience.