Never Split the Difference

A former FBI hostage negotiator breaks down some key negotiation strategies. Part how-to and part history of the FBI's negotiation techniques, with a lot of real-world stories from the author's career.

Completely fascinating. It's largely geared towards business students (the author has a company that consults and teaches negotiation skills), but the strategies themselves are wonderfully explained and how they evolved over time is super interesting. Great, smooth read and stuff you can actually use.