What, communists? People teaching children to hate their parents and tear down society? Yes, I'm sure it's real.
This book is real:
http://en.wikipedia.org/wiki/Das_Kapital
"Das Kapital" means "money". It's a book that was targeted at monetary innovators and activists from any political persuasion, and it looked into the essence of money and how it has been interpreted and misinterpreted over the last three millennia.
To learn about the real effects of that book and its ideas, see also:
http://en.wikipedia.org/wiki/Category:Communist_revolutions
This link doesn't have the total figure of how many hundreds of millions of people were killed over these ideas, but it's a good start.