Antonio often works with his son, Antonio Castro H., who is one of Cinco Puntos' primary designers. When Antonio illustrates a book, his son and he plan the book design and the artwork together so that the books they create are made hand in hand by father and son.
In 2005, the government of the State of Chihuahua, Mexico, commissioned Antonio to paint a mural for the government palace. The mural commemorates the anniversary of the Battle of Tomochic. His work has been exhibited in galleries and museums in Texas, Mexico City, Oaxaca, Spain and Italy.