Anarcho-syndicalism.

This short book is very interesting, perhaps most as a history of organized labor, Anarchism and Syndicalism. It is all the more interesting for having been written during the Spanish Civil War, just before the start of World War II, and for the epilogue, written nine years later, shortly after the end of WWII, which provides an update on the state of Anarcho-Syndicalism in the world at that time. The introduction, with biographical information about Rocker, and the story of how the book came into being, is also valuable. Despite featuring prominently in the subtitle, the theory of Anarcho-Syndicalism gets less attention than the practice.

One of the first books (different edition though) I have read about anarchism (and syndicalism) as kid and right away I felt like this really is my thing! After that I've read it couple of times atleast and even have few different editions of it.

Rocker does a lot of great service in presenting historical currents and events in his detailing of anarchist movements, revolutions and ways in which the communities in question organised themselves, however I found a little less in the way of theoretical exploration of concepts than expected.