Hellboy: Masks and Monsters

In 2010, Dark Horse released this single-issue crossover that pits Hellboy against the Phantom of the Opera. Written by James Robinson with art by Mike Mignola, the story brings the B.P.R.D.'s signature monster-hunter to 1920s Paris for a clash with a classic literary fiend. It stands as a standalone, atmospheric oddity in Mignola's larger Hellboy mythos, teaming two distinct pulp horror traditions.