Hi Asgara,
I actually liked the recent Franken book more than Moore's books (though I just bought Dude, where's my country? but have not read it yet).
I thought Franken, besides being really funny, was extremely meticulous with his references and cites which is critical. His main point is that lots of things are said in the news that are mere rumors but become fact by mere repetition or by a systematic push from an ideological group. By being so meticulous it is much harder to criticize him for just being a partisan hack like the people he attacks in his book. Moore is not always so meticulous and throws in more opinion but is still very entertaining and I am glad he is out there doing what he is doing...he is a bigger here in Germany than in the U.S.
The only problem with Franken's book is it starts out really funny but then as you think about the content, it really is not very funny at all and in fact what it says about the U.S. today is sadly accurate and horrible.