What is Communist anarchism?

Now and After: The ABC of Communist Anarchism is an introduction to the principles of anarchism and anarchist communism written by Alexander Berkman. First published in 1929 by Vanguard Press, Now and After has been reprinted many times, often in partial or abbreviated versions, under the titles What Is Communist Anarchism?, What Is Anarchism? or The ABC of Anarchism.

(Source: Wikipedia)