David Ohrvall · Ohrvall Media LLC.
| title | ISBN-13 | year of publication |
|---|---|---|
| Crack the Case: How to Conquer Your Case Interviews: 2006 Edition | 978-0-9744428-5-3 | 2005 |
| Crack the Case System: Complete Case Interview Prep | 978-0-9744428-4-6 | 2011 |
| Crack the Case System: How to Conquer Your Case Interviews | 978-0-9967792-0-3 | 2015 |
| Interview Logic: Make Your Value Known | 978-0-9967792-6-5 | 2018 |