Schwab, V E: The Fragile Threads of Power (Paperback)

Rhy Maresh is king of a city alive with conspiracy. Lila and Kell sail as pirates, living the freedom of the waves. But Kell is cursed, to never be able to use magic again. Kosika rules White London. But her magic calls on familiar spirits, even all the way to Black London. And a young woman with a knack for fixing broken things comes across a stolen, powerful artefact - one that people will kill to get back...