Hire with Your Head by Lou Adler details a step-by-step system for attracting and hiring top talent. This book comes as part of the POWER Hiring seminar materials. It is practical, usable information that will dramatically increase the effectiveness of the hiring process. Lou enjoys an 80%-90% hiring accuracy in his executive search firm.
First Break All the Rules by Marcus Buckingham & Curt Coffman gives insight into what great managers do to make their organizations great. Surprisingly great managers are doing things very differently. Think you're great? Read the book and learn how you measure up against the criteria it lays out.
Seven Habits of Highly Effective People by Stephen Covey is a classic. The writing is amazing and the principles are powerful. It suggests one of the best time management strategies available. Applying the concepts creates organizations and professionals who are visionary and centered. My personal opinion is that the book is much better than the audio version.