I was reading an article today which described books which are very bizarre or they were written under strange circumstances.
http://www.cracked.com/article_19942_the-6-most-certifiably-insane-acts-writing.html
Reading this, some other books came into my mind such as Gadsby, which has no 'e' or Ulysses which has a very long last sentence.
What more can you guys thing of?