Mysterious Powers series
The Mysterious Powers series focuses on how the Great War affected people in the institutional structures of Albion. The books can be read in any order. Fool's Gold does contain spoilers for the events of Seven Sisters.
Forged in Combat
1882
A prequel novella set in India as Arthur and Melusina lend their skills to a problem.
Fool's Gold
1926
Robin meets Beatrice, and they are thrown into solving a problem affecting the Scali banking family
The Hare and the Oak
1926
Cyrus and Mabyn explore solutions to a key problem with the land magic in Suffolk.
Mistress of Birds
1927
When Thalia takes care of a remote house on the edge of Dartmoor, she and Adam discover the house has secrets.