In short 'Council Communism' was/is the critical and theoretical reflection of the revolutionary mass struggles of the working class in western Europe   -  especially those in Germany  -   following  the I. World War.

First introductions for beginners could be:

• Steve Wright:
  Revolutionary Traditions - Council Communism
  
  
• Neil Fettes:
  Council Communism

Some more elaborating introductions are:

• Richard Gombin:
  Council Communism
  
  
• Mark Shipway:
  Council Communism
  
  
• Marcel van der Linden:
  On Council Communism

From some of these we can offer various e-versions  - fully or partly:

• Peter J. Rachleff:
  Conncil Communist Theory