Peter Ericson’s review published on Letterboxd :
I tend to enjoy stories that involve ancient mysteries, historical riddles, old books, and symbolism, and while "The Ninth Gate" starts out promising, my interest gradually declined as the film progressed. It is often slow-paced, which is appropriate for a film of this kind, and yet I think that the central mystery is not satisfyingly addressed. The last part of the film feels somewhat out of place. Most memorable characters: the Ceniza twins.