I finished "Stretch: Unlock the Power of Less - and Achieve Than You Ever Imagined" by Scott Sonenshein a few weeks ago, and have had the ideas rolling around in my head since then. I really like the overall premise of the book: lean towards Stretching instead of Chasing. I found that it nicely connects to the ideas of Theory of Constraints and process improvement in general.

I came across "Guest Blog: Finding Science and Success with Lean Principles in R&D" by Norbert Majerus of Goodyear on the Factory Physics website, and it describes the Factory Physics ideas as applied in new product development, and I thought it was a pretty good summary. This is also a lot of what we do with Theory of Constraints concepts applied in product development (and project management) arenas too.

Never Split the Difference: Negotiating As If Your Life Depended On It by Chris Voss was recommended by a couple colleagues.  This is a great book on negotiation (and a bunch of related topics). Voss and Raz start each topic with a life-and-death hostage negotiation and then delve into the ideas behind the topic and where these apply in the less dire scenarios people face every day.  The authors use Voss' own experiences in the FBI as the lead international kidnapping negotiator, his research and studies into what makes negotiations work (or not), and his teaching and consulting work.  These elements are combined in a fairly engaging style: starting each chapter with a hostage situation made me want to keep reading to find out what happened, ... and learn a lot along the way.