Les Disparus Du Clairdelune by Christelle Dabos

Ophélie, a shy young 'reader' who can read objects and pass through mirrors, is plunged into a web of mystery and court intrigue when inhabitants of the elegant island of Clairdelune begin to disappear. Isolated in a world of fragile alliances, shifting loyalties and strange powers, she must use her unusual gifts and her tenuous bond with the distant Thorn to uncover a dangerous conspiracy that threatens the delicate order of the floating arks. The story blends mystery, political maneuvering and growing self-discovery against a richly imaginative, gothic-fantastical backdrop.

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