Roy Thomas is an American comic book writer and editor, best known for his work with Marvel Comics and DC Comics. He played a significant role in the development of popular characters and storylines during the 1960s and 1970s, including his contributions to The Avengers and X-Men. In addition to his writing, Thomas is recognized for adapting literary works into comic form, such as Conan the Barbarian. His influence on the comic book industry has earned him a lasting legacy, and he is often celebrated for his storytelling and character development skills.