+ No Treason: The Constitution of No Authority by Lysander Spooner - PDF and audio book (youtube)
+ Nature and Madness by Paul Shepard (free at archive.org)
+ Future Primitive (revisited) by John Zerzan (free at archive.org)
+ The Chalice and the Blade: Our History, Our Future by Riane Eisler. Free chapters (intro, 4, 5, 6, 7)
+ The Underground History of American Education by John Taylor Gatto (free at archive.org)

Recommended:
+ An Act of State by William Pepper (friend and family lawyer of Martin Luther King, Jr.). See WilliamPepper.com

+ Also see this "wikipad" list.