Who is The Anand Marg from Karma Cola: Marketing the Mystic East and what is their importance?

The Anand Marg is the name given to a group of followers of the guru Sarkar, whose beliefs and practices came under attack from his wife who was, in turn, attacked by Sarkar and his followers. In order to reinforce their position of authority, the author says, the Anand Marg engaged in political sabotage and violent attacks on those who opposed them.