The only "political book" remotely worth reading is Fear and Loathing on the Campaign Trail '72.
I really despise this position, as awesome as Fear and Loathing was. I have found great value in political books, and biographies in particular. I just checked out
The Years of Lyndon Johnson/Path to Power by Robert Caro. I also have
The Power Broker (also Caro), which I intend to start reading after I finish Double Down.
Campaign books are great, and having worked on a few small to medium scale campaigns, they are surprisingly accurate and less West Wing/House of Cardsish then you would think. While Double Down and Game Change both focus around what is basically supermarket tabloid gossip, the actual interactions/decisions behind the stories are what interest me. I could care less if Christie shared a hotel room with a fellow US Attorney who happened to be female, but I am intrigued as to how the staff found out about it, and how they reasoned the media would deal with it. Of course, I plan on working in this field:P.