Carlos Fuentes.
La region más transparente.
Madrid: Real Academia Española, 2008. Commemorative edition. "Texto revisado por el autor para esta edición." 9788420422503 677 pages.
Hardcover volume, measuring approximately 5.5" x 8.25", is like new, with front board displaying very mildly bumped lower outside corner. 
This edition offers preliminary texts by Gonzalo Celorio, José Emilio Pacheco, Vicente Quirate, as well as contributions by Carmen Iglesias, Sergio Ramirez, Nelida Piñon, and Juan Luis Cebrián. Bibliography, glossary, name index are also present.