What reading material should I take?

I'm not sure what reading material I want to take on my trip this year. Usually I don't get to read much but last year I read The Assault on Reason and really enjoyed it. It was also a fairly compact book which was good for traveling. Most of my reading was done on trains and the flight home.

So this year my choices come from many books I have started but are not done and should probably just start over (or a couple I want to re-read). They are:

• Free Culture, Lawrence Lessig (this could likely be part of a pair)
  
• Blackwater, Jeremy Scahill
• 23 Days In July, John Wilcockson
  
• Our Endangered Values, Jimmy Carter
  
• The Age of Turbulence, Alan Greenspan (kind of big)
  
• The Audacity of Hope, Barack Obama
• Where the Right Went Wrong, Patrick J. Buchanan
  
• The Fairtax Book, Neal Boortz (nice and compact)
  

And I don't care for any fiction. I'd rather learn something considering how long it takes me to get through a book. I really do have to much politics in my reading list though, wow. I could also always take some magazines but it is nicer to have 1 book. Thoughts?