The Complete Project Manager: Integrating People, Organizational, and Technical Skills is the practical guide that addresses the "soft" project management skills that are so essential to successful project, program, and portfolio management. Through a storytelling approach, the authors explain the necessary skills--and how to use them--to create an environment that supports project success. They demonstrate both the "why" and the "how" of creatively applying soft project management skills in the areas of leadership, conflict resolution, negotiations, change management, and more. This guide has an accompanying workbook, The Complete Project Manager's Toolkit, sold separately.
Read this one to write a journal review, so I can't put all of that content here. But I would recommend to people already employed as project managers who want to improve their skills, or to those who have been thrust into similar roles coming from a technical background who need a basic intro to people, management, networking, business skills, and more. There are twelve chapters on various skill types, and each is mostly independent if you want to just work on a couple of specific ones.