One of the most awesome things I’ve ever heard of is The Brautigan Library. Inspired by Richard Brautigan’s novel The Abortion, the Library comprises books whose only criterion for inclusion is that they’ve never been published (the authors must pay the costs of binding).  Books are organized in the unique manner of The Mayonnaise System; examples of categories are “Love,” “The Future,” “Adventure,” and “All the Rest.”  The Library is/was in Burlington, VT and grew to include 325 books.  A visit to the Library must have been a random and surreal experience, as described here.  As of 2004, it was scheduled to be moved to the San Francisco Public Library’s Presidio Branch. The Abortion also inspired The Library of Unwritten Books in the UK, which consists of ideas for books, but no actual books.