They say you can tell a lot about a person by the books they read. If that’s true, what does this list of the top-selling books purchased at last month’s Society for Human Resource Management annual conference in Las Vegas tell you about the HR professional in the 21st century? Can you figure it out:

The Carrot Principle—How the Best Managers Use Recognition to Engage Their People, Retain Talent and Accelerate Performance, by Adrian Gostick and Chester Elton

7 Hidden Reasons Employees Leave—How to Recognize the Subtle Signs and Act Before It’s Too Late, by F. Leigh Branham

Perfect Phrases for Performance Reviews, by Robert Bacal and Douglas Max

Perfect Phrases for Managers & Supervisors, by Meryl Runion

Hot Spots—Why Some Teams, Workplaces and Organizations Buzz with Energy—and Others Don’t, by Lynda Gratton

It’s OK to Be the Boss—The Step-by-Step Guide to Becoming the Manager Your Employees Need, by Bruce Tulgan

Effective Phrases for Performance Appraisals—A Guide to Successful Evaluations, by James E. Neal. Jr.

The Voice of Authority, by Dianna Booher

Ask the Right Questions, Hire the Best People, by Ron Fry

101 Sample Write-Ups for Documenting Employee Performance Problems—A Guide to Progressive Discipline & Termination, by Paul Falcone