JoBlo has a great video about Nightbreed, Nightbreed: The Movie the Studio Tried to Destroy

The Director's Cut is the one to watch. It follows the novella "Cabal" almost exactly and the villain (spoiler, I guess) is played by David Cronenberg. They don't go quite as deeply into the Doctor's relationship with his mask. It's much deeper and creepier in the novella.

After that, see if you can find a copy of the out-of-print "Midian Unmade: Tales of Clive Barker's Nightbreed". It includes multiple authors' takes on Midian and the Nightbreed after the events of the movie. There are two ISBNs listed for it 1466823623, 9781466823624

Of, if you want an official canon, see if you can find the "Clive Barker's Nightbreed" comics or graphic novels.

#CliveBarker #Nightbreed #Midian