Two new books explore what it's like for journalists behind bars -- one from the perspective of the prisoner and one from the perspective of the advocate trying to get him out. Jason Rezaian, author of "Prisoner," reflects on his time in Iranian captivity. And Joel Simon, author of "We Want to Negotiate: The Secret World of Kidnapping, Hostages and Ransom," examines the dynamics of kidnappings by "non-state actors." They compare and contrast their work, and takeaways from each book, with Brian Stelter. via Knit