The Human Equation: Building Profits by Putting People First

A Pfeffer classic.  He lays out the value of being a manager who focuses on getting the most from your team.  If all you learn from this book is that layoffs are ineffective, it's earned its value.  (Though don't assume you won't ever see one again).  He talks about specific things companies can do in hiring and development that relate directly to Manager Tools principles.