His first magazine article was published in 1941, and for the next year he wrote book reviews and translated books into Spanish. His first book, a collection of essays on the morality of science and technology, was published in 1945. His first novel, a thriller, was published in 1948, and has been translated into ten languages. His third novel, "Abaddón el exterminador" ("The Angel of Darkness"), was named in France as the best foreign book of 1976.