Exceptional, if overly brief, overview of the history and philosophy of anarchist thought, specifcaly the anarcho-syndicast movements and the impact of anarchist trade unions in Europe and Latin America. The text itself is sort of dry (being a political treastie and all) but very readable, and drives all of it's points home quite admirably considering the brief length.
Of course, at such a short length, it's hard to recommend this to anyone already familiar with anarchism. Still a great intro, and mentions many names, organizations, and writings which one can apply to make quite a reading list. Top tier for anarchist priming!