SC – Quill & Quire (starred review)

Readers will be enraptured by this gripping tale, which delivers fast-paced fantasy and rich psychological drama.... The protagonists' experiences of social injustices add to the text's philosophical meatiness, making it much more than a simple adventure story. Even as they explore the natural world, Oppel's satisfyingly complex characters examine what it means to be human. 

– Quill & Quire (starred review)