Reiner Tosstorff's book gives a detailed account of the history of the Red International of Labour Unions (RILU), founded in 1921 as a body associated with the Communist International. Whereas the Comintern organised the minority of workers belonging to revolutionary parties, the trade-unions were the mass-organisation of the class. Tosstorff traces the various organisational problems that attended the founding of the RILU, and the splits, alliances, manoeuvres, negotiations and compromises that characterised its early years. From 1924 onwards the RILU rapidly became no more than an appendage of the Comintern, echoing the errors and betrayals of the latter body. The book contains a wealth of historical detail that makes it the standard work on the question. It may also have contemporary relevance to the way in which Marxists relate to the post-Seattle generation of anti-capitalists.