Sequels And Prequels

"Margin of Profit" was the first Nicholas van Rijn and Polesotechnic League story but its sequels generated prequels:

later, van Rijn founds a trader team which includes David Falkayn and Adzel, a large quadrupedal Wodenite;

later again, Falkayn leads the joint human-Ythrian colonization of the planet, Avalon;

centuries later on Avalon, Tabitha Falkayn has an affair with Philippe Rochefort, a Jerusalem Catholic.

Four prequels:

the Jerusalem Catholic Church existed as early as the mid-twenty-first century;

human explorers discovered Ythri;

Ythrians, employing some human beings, explored the planet later named Avalon;

Adzel studied planetology on Earth.

The Technic History grows forwards and backwards.