From "Gypsy" To THE PEREGRINE

The first Nomads are introduced in "Gypsy."

The planet Nerthus is introduced in "The Acolytes" and ts sequel, "The Green Thumb."

The Stellar Union Coordination Service has a base on Nerthus in Virgin Planet.

The Co-ordination Service is explained and the Coordination Patrol is also mentioned in "Teucan."

Trevelyan Micah of the Coordination Service is introduced in "The Pirate."

Trevelyan joins the Nomad ship, the Peregrine, while it orbits Nerthus in The Peregrine.

Thus:

these seven works comprise a major, well-integrated section of Poul Anderson's Psychotechnic History;

The Peregrine is the culmination of the Stellar Union period of this future history series.