Brian Azzarello is an American comic book writer and screenwriter who first came to prominence with the hardboiled crime series 100 Bullets, published by DC Comics' mature-audience imprint Vertigo. Azzarello is best known for his numerous collaborations with artists Eduardo Risso and Lee Bermejo, his contributions to the Watchmen prequel project Before Watchmen and The Dark Knight Returns sequel series DK III: The Master Race, as well as for his stints on the long-running Vertigo series Hellblazer and The New 52 relaunch of the Wonder Woman title.

Spaceman is a nine-issue, science fiction comic book miniseries written by Brian Azzarello, illustrated by Eduardo Risso, and published by Vertigo. Azzarello and Risso previously collaborated for more than ten years on the Vertigo series 100 Bullets, as well as other projects such as the Flashpoint miniseries Batman: Knight of Vengeance.