His earliest U.S. credit is penciling and inking the ten-page story "The King Is Dead", by writer Jack Oleck, in DC Comics' House of Mystery #194 (Sept.

[7] Other adaptations illustrated by Redondo for Pendulum included The Great Adventures of Sherlock Holmes, some Edgar Allan Poe stories, The Odyssey, and Romeo and Juliet.

In addition, Redondo illustrated a Pendulum comic-book history of the American Civil War, and biographies of Madame Curie, Albert Einstein, and Abraham Lincoln.

In the mid-1980s, Redondo inked the Eclipse Comics time-travel series Aztec Ace, by writer Doug Moench and pencilers Michael Hernandez and Dan Day.

[16] In preparation for the First International Christian Comics Training Conference in Tagaytay, the Philippines, in January 1996, Redondo wrote On Realistic Illustration for his main teaching session, but died before he was able to deliver it personally.