Stephane Courtois & Marc Lazar 
Comrades and Brothers [PDF ebook] 
Communism and Trade Unions in Europe

Originally published in 1991, this book opens with a theoretical and historical section and analyses the affairs of both the communist party and the trade unions of specific European countries. The first part of the book deals with cases of communist strength, where the communist part had close links with a particular trade union (France, Italy, Spain). The second part looks at cases where social democracy dominated the Left (Belgium, The Netherlands and the UK). Two further essays examine developments in the 1980s in Hungary and Poland.