Four Histories

My copy of The Complete Psychotechnic League, Volume 2, arrived. That is quite a cover.

It is good to have:

the Time Patrol series complete in 2 volumes;

the Psychotechnic History complete in 3 volumes;

the Technic History complete in 7 volumes -

- although I think that the Psychotechnic History could have been fitted into 2 volumes.

I have also seen a cover for The King Of Ys by Poul and Karen Anderson complete in 1 volume. If that were still in print, then these four major Andersonian series would be complete in 13 volumes.

All four series are about history:

Ys, a major turning point in the past;
Time Patrol, many periods and turning points in the past and some information about a future;
Psychotechnic and Technic, many periods and turning points in two further futures.

One of the Nine Witch-Queens of Ys senses the interstellar spaces. See here. In the three futures, human beings cross interplanetary and interstellar spaces and, e.g., colonize Venus.

In the Time Patrol series:

in the twenty fourth century, a Dutch-Indonesian-Venerian is recruited into the Patrol;
in the thirtieth century, when Rozher Schtein's family has been killed in a Venerian raid, he steals a time machine and tries to change history, starting in post-Roman Britain.

In the Psychotechnic History:

while Venus is being terraformed, a UN agent overthrows a Venerian dictatorship;
later, the kilt-wearing, clan-based society on Venus includes a Lucifer Clan.

In the Technic History:

Venus is incompletely terraformed;
a Venerian slum is called Sub-Lucifer.

My advice: read them all.