The book was written in 1946 and wasn't published until 1992 being 4 years after Heinlen died.
It is written in the context of American politics but as far as grass roots organizing and politicking in general it still has relevance today.
Anyone that has had anything to do with politics at a local branch level will recognize at least some of the sentiments and ideas put forward and if you have never been engaged it is the only book I've ever come across that will give you some insights of what you are liable to encounter.
If anyone is interested then I believe it is still available for sale on the second hand market. 2012 was the last edition printed.
If anyone is interested shoot me a Personal Message.
The enemy have us surrounded. Good! Now we know where to find the bastards! -various