| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2003 | 978-0-9744179-0-5 | Penny Reynolds | Call Center Staffing: The Complete, Practical Guide to Workforce Management |
| 2004 | 978-0-9744179-1-2 | Maggie Klenke | Business School Essentials for Call Center Leaders |
| '' | 978-0-9744179-2-9 | Penny Reynolds | Call Center Supervision: The Complete, Practical Guide to Managing Frontline Staff |
| 2005 | 978-0-9744179-3-6 | '' | The Power of One |
| 2008 | 978-0-9744179-4-3 | '' | Power Phrasing |