The Key to Eraserhead?

In the end, what's important is the film itself

Jon Fairhurst offers an original approach to film analysis by proposing the possible influence of a classic text on David Lynch’s Eraserhead in the form of a graphic novel, The Key to Eraserhead, released as an ebook on the 40th anniversary of the film’s first public screening at Filmex in Los Angeles on March 19, 1977.