Douglas Hofstadter's award-winning book, Gödel, Escher, Bach, is a journey through surprisingly intertwined ideas from mathematics, art, music, computer science, and philosophy. Something about Zettlekasten and strange loops.
The wiki was started in December 2014, by members of /r/geb on Reddit. Anyone can begin editing and contributing to the wiki, simply by creating an account. The Shared Experience of GEB.