The message of the book and movie are different. The book is basically a documentary of interviews with people that claimed to have been involved in the First Earth Battalion group within the Army. The movie takes several of the book ideas and invents a “historical fiction” type of story around it. Taken in this context, I thought it was hilarious with a great group of actors all doing a fabulous job (in a similar vein, like Ghostbusters incorporating paranormal research jargon and experiments). In particular, Ian McEwan was surprisingly effective in his role and the references to Star Wars were funny, if not drawn out a few times too many. Clooney, Bridges and Spacey did their usual great jobs as well.