- E-bookThe Common Sense Approach to ManagementRobert Jacobi
- E-bookJarzen Tadel - Echoes of DestinyRobert Jacobi
- E-bookJarzen Tadel Echoes of FreedomRobert Jacobi
- E-bookJarzen Tadel - Echoes of AlchemyRobert Jacobi
- E-bookJarzen Tadel Echoes of ReplicationRobert Jacobi
- E-bookJarzen Tadel - Echoes of ChaosRobert Jacobi
- E-bookJarzen Tadel - Echoes of PeaceRobert Jacobi