The book on those pioneers of art hacktivism...
This 2009 Italian book by ChARTA publishers is the first sum of its kind about the great contemporary art activists Eva and Franco Mattes, former part of the Luther Blissett collective (just like the Wu Ming), and creators of the famous art concepts / events of "Stolen Pieces", "Darko Maver" (the renowned artist who didn't exist), "NikePlatz in Vienna" and many others. Here we have real pioneers of the art hacktivism, just like La Spirale (http://www.laspirale.org/) of course ! Great pictures and explanations on the site : http://www.0100101110101101.org/projects.html
The avid fan will consider as a nice bonus in that book a full text by the Wu Ming commenting about the "Eurollywood" project (fake ad campaign about the non-existing movie "United We Stand").
A must for the radical art fan ;-)