João Manuel Rosado Barreiros (born July 31, 1952), also known by the pseudonym José de Barros, is a Portuguese science fiction writer, editor, translator and critic.
Barreiros's writing style, influenced by that of Robert Silverberg and James Tiptree, Jr, is distinctively sardonic and shows a marked tendency towards satire and black comedy.
The stories tend to offer extremely graphic depictions of violence, and utterly reject political correctness and its icons — Walt Disney and Sesame Street are frequent targets of derision by Barreiros, for example, and he has gone so far as to cast Big Bird analogues as the principal antagonists in A verdadeira invasão dos marcianos.
He has twice won the Brazilian Nova Award, offered by fans to the best foreign short story published in South America, for "Um Dia com Júlia na Necrosfera" (in 1992) and "A Arder Caíram os Anjos" (in 1994).
The mercilessness of Barreiros's criticism earned him a reputation among Portuguese science fiction fans, and his titanium nib fountain pen gained legendary status as a result.