I'm a big fan of Kafka, and about everything of his that I've read, so far. I very much like that quality of experiencing a disturbing dream, along with that absurd dream logic that he could spin.
If you're new to Kafka, I'd suggest you also look In The Penal Colony, The Hunger Artist, and Josephine The Singer, Or The Mouse People, just to name a few. Admittedly, I found wading through The Trial to be something of a chore, but others seem to like it.
Not to sound like an ass plugging myself (or maybe I am), I used The Metamorphosis as a jumping off point for the first story I had published, called The Gregor Samsa Appreciation Society.
_________________
-Bill, otherwise known as Kraichgauer