Sorcerer to the Crown (Sorcerer Royal trilogy, Band 1)

THE FATE OF ENGLISH MAGIC
LIES IN THEIR HANDS
In Regency London, Zacharias Wythe is England's first African Sorcerer Royal. But how can he enjoy his position, while a faction schemes to remove him? He's also haunted by his dead mentor's ghost and the Fairy Court is refusing to supply England with magic . . . just when the government demands
it for their blasted French war.
Ambitious orphan Prunella is determined to escape a life of drudgery. So when the beleaguered Sorcerer Royal visits the school where she works, she seizes her opportunity. Prunella's stumbled upon the greatest magical discovery in centuries - and intends to use it. The last thing Zacharias needs is a female magical prodigy! But together, they could change sorcery forever.
'An enchanting cross between Georgette Heyer and Susanna Clarke'
Naomi Novik
'Tells an entertaining story with wit and consummate skill'
Guardian
'Cho's debut has much to recommend it'
Financial Times