Adamant

Ever since a devastating magical war tore apart Ada Fletcher's homeworld, she and her family have lived undercover on the low-magic Earth. Stuck in a dead-end job in London, Ada has spent her life hiding both her true identity and her forbidden magic from the Inter-World Alliance: the organisation that polices the Passages between Earth and its magical neighbours.

At least until a high-ranking Alliance official is murdered, and Ada is arrested as the main suspect.

Kay Walker, grandson of the ...