The Graduate Register
An adult romantasy, unfolding one fold over from the children's school: the Graduate Fold, where the school calls back the students it has finished with and isn't done with. The same corridors — older eyes. For grown-up readers.
The Books
The Hollow's Keeper
Maren Voss takes a dull registrar's post in the Graduate Fold, the school's hidden adult layer — and is quietly hunting the cloaked figure who keeps its peace, who is only a man in a plain grey cloak.
The Keeper's Minute
The Quiet Office sends an auditor; Cas's mother, who wore the cloak before him, returns; and a torn page, opened at last, offers a freedom that would end everything it freed.
The Keeper's Shelf
The Fold thins as the magic thins, the dead lines' books fade faster than one Keeper can keep them, and Mrs. Bell comes through her own door.
The Graduate Register runs concurrently with the Wiken books, beginning alongside Book Two — what the children never see, happening one fold over.