I've considered this question for some time and don't know of 'one book'.
See my sig for some authors that are good.
But to answer the question with 'a' good book:
For American Imperialists, or any imperialists, one book is Michael Parenti's "Against Empire". I recommend it not as a book to agree with every word, but it is eye-opening.
For Militarists, I'd suggest Chris Hedges' "War is a Force That Gives Us Meaning".
For unconditional supportes of US foreign policy, Chalmers Johnson's "Nemesis".
For advocates of corporations having 'free speech' rights, Thom Hartmann's "Unequal Protections".
For tea party members, a coloring book with words.
For fans of corporations' international activities, John Perkins' "Confessions of an Economic Hit Man".
For people who believe in a 'liberal media', "What Liberal Media?"
For followers of right-wing media, David Brock's "Blinded by the Right".
For people who think George Bush wasn't a terrible president, "The Book on Bush"; for people who think the Republican Party isn't terrible, "Banana Republicans".
For people who can use a bit of a summary of some groups, "What Every American Should Know About Who's Really Running the World".
For those who don't understand how democracies are attacked at time by authoritarian forces, Naomi Klein's "The Shock Doctrine".
For those who think the presidential elections are ok, try an early critique of "The Selling of the President 1968".
For other topics, ask.