Kameron Hurley is an author probably best known within the SFF community for her non-fiction essay "We Have Always Fought: Challenging the 'Women, Cattle and Slaves' Narrative" who won the Hugo for Best Related Work last year. The Mirror Empire, part one of the Worldbreaker Saga, is her fourth book, the beginning of a fantasy series following her debut trilogy, the science fictional Bel Dame Apocrypha. To anyone familiar with Hurley's previous work, whether fiction or non-fiction, the ambitious, detailed worldbuilding, the attention to complex gender politics, and the well-written, challenging female characters of The Mirror Empire will be well-known territory.