free to read and download plain PDF , EPUB (for mobile etc) https://theanarchistlibrary.org/library/peter-gelderloos-anarchy-works
EN ESPAÑOL AQUI https://es.theanarchistlibrary.org/library/peter-gelderloos-la-anarquia-funciona
This book takes examples from around the world, picking through 
history and anthropology, showing that people have, in different ways and at different times, demonstrated mutual aid, self-organization, autonomy, horizontal decision making, and so forth–the principles that anarchy is founded on–regardless of whether they called themselves anarchists or not.
Too well documented to be strictly mythology, and too generalized to be strictly anthropology, this is an inspiring answer to the people who say that anarchists are utopian: a point-by-point introduction to how anarchy can and has actually worked.
The Free 