The Fluxus Reader has been out of print for many years now. In the run-up to 2012, a free digital edition available has been made available.
http://hdl.handle.net/1959.3/42234
The book is an open access edition, configured for full search and accessible for copy and paste for scholars or students who wish to quote from the book. All details and pages are identical with the print edition. The PDF files are set to print out on a full-page format for easy reading.
In Ken Friedman’s contract with the publisher, he kept the copyright of the book as editor. In making the digital edition of the Fluxus Reader available, he has granted full permission for use in any format or medium.