| 2012 Commercial Building Inspector | $83.99 |
| W31 National Standard Journeyman Mechanical Questions Workbook | $81.99 |
| 2021 Commercial Plumbing Inspector | $91.99 |
| 2012 Commercial Plumbing Inspector | $86.99 |
| 2015 Commercial Building Inspector | $83.99 |
| 2018 Residential Mechanical Inspector | $81.99 |
| 2012 Residential Mechanical Inspector | $81.99 |
| 2021 Residential Mechanical Inspector | $81.99 |