Cities In Flight
The Seedling Stars
The Haertel Scholium
After Such Knowledge
Haertel Scholium works either feature or refer, directly or indirectly, to Adolph Haertel.
After Such Knowldege, Volume III, A Case of Conscience, is a Haertel Scholium novel.
Blish's main bodies of work can also be listed as three future histories and three (Haertel-related) trilogies.
Future Histories
Cities In Flight
The Seedling Stars
The Haertel History
Trilogies
The Heart Stars Trilogy
The Quincunx Trilogy
After Such Knowledge