The Willows is a tale in the cosmic horror tradition, but could just as easily fall into folk horror (as many older cosmic horror stories could) for its bucolic European setting and use of natural landscapes to create a sense of dread.

And there is dread here, in the graduation dissolution of the very ground, not to mention the sanity of the two protagonists. But in the end, I felt much of the buildup dragged on, while the resolution was over in an instant. Worth reading, but not exactly satisfying.