Joseph Mugniani was an Italian/American artist, printmaker and illustrator active in the 20th century.
He is best known for his illustrations for the works of Ray Bradbury, who was also his longtime friend. Mugniani was also the author of several books on drawing and painting (Amazon link).
I particularly enjoy his darkly textural lithographs.
The best source I’ve seen for images of Mugniani’s work is this article on Monster Brains.