I have received last week review copies of four new books released by Theme Park Press over the last few months. My favorite one is Service with Character by David Lesjak which includes a lot of material that I had never seen before. That book is a "must have".
If you enjoy Kindle books then that is the version of David's book you want to get since it contains illustrations, which is not the case of the physical book. But you know me and my love for physical books. Considering how cheap the Kindle version is, I would recommend getting both the physical book and the Kindle one. But that is just me, of course!