| Our Iceberg Is Melting | Kotter, John | St Martins Pr |
| Das Pinguin-Prinzip (DAISY Edition) | Kotter, John | |
| Das Pinguin-Prinzip | Kotter, John | |
| Das Pinguin-Prinzip | Kotter, John | |
| Das Pinguin-Prinzip | Kotter, John | |
| Buy-In | Kotter, John | |
| Our Iceberg Is Melting | Kotter, John |
