The TSA began a new screening policy for paper products at airport checkpoints in Missouri last month, and now the agency's branch in Sacramento, California, is testing out more invasive searches for books and food items.
In the new system, passengers are required to take all reading material and food out of their carry-on luggage and place it in a separate bin. TSA screeners can "fan" through travelers' books to see if anything is hidden in the pages, but agency officials insist they will not pay attention to the content. Critics have long argued passengers selected for extra screening are not chosen as randomly as the TSA claims, and book content — particularly of a political or religious nature — could re-ignite that debate.
http://theweek.com/speedreads/702737/tsa-going-look-through-books-but-promises-not-notice-what-youre-reading