Sandra M. Reed, SPHR, SHRM-SCP, is a leading expert in the certification of HR professionals. She is the author of the 2nd edition of The Official Guide to the Human Resource Body of Knowledge and the 5th edition of the PHR and SPHR Professional in Human Resources Certification Complete Study Guide: 2018 Exams. Reed is also the author of case studies and learning modules for the Society of Human Resource Management, teaching and writing content for undergraduate studies at both public and private universities.