Series Seven is one of the Related Worlds. It is where Conrad Tesdinic comes from and is home to the English Alps. In Series Seven, Britain has not split from the European mainland, some of Europe is divided into states, and the capital of Britain is located on the plains and is located by a river. Stallchester is located here, and is the home of the bookshop Grant and Tesdinic. There is a world in Series Seven where Christopher Chant was led to a glacier in an otherwise tropical environment by a "Gypsy man." In Conrad's Fate it is revealed that Christopher rides around with these people and that they, like him, travel between the Related Worlds in their wagons. There is a moss on that world that is magical and is therefore smuggled to Twelve-A by Ralph Argent.

The Related Worlds
Series One, Series Two, Series Three, Series Four, Series Five, Series Six, Series Seven, Series Eight, Series Nine, Series Ten, Series Eleven, Series Twelve