Thanks to NetGalley and Roaring Brook Press for an advance copy.

tl;dr
A beautifully written book with powerful characters and a rollercoaster ride of plot twists that's nearly impossible to put down.

About
In a land torn by war, three warlordesses fight for control. Zephyr is a brilliant strategist, and she'll do whatever it takes to keep her lordess Xin Ren safe. With armies at their heels and resources thin, Zephyr's only choice is to infiltrate the enemy's ranks and destroy them from within. But when the enemy's strategist Crow appears, has she finally met her match?

Thoughts
I'm already counting down the days to the sequel. The author's notes in the back state that this is her favorite book, and with good reason. It's an excellent book. War stratagems and human complexity clash beautifully and painfully in this retelling of The Three Kingdoms (although no familiarity with the original is necessary to enjoy this). The plot drives the story, but there's plenty of space for human interaction, including very thoughtful portrayals of the many different forms of sisterhood. Zephyr is an absolutely stunning main character. Bold, capable, confident, and utterly unshakeable. As much as I love a story where the MC learns to believe in themselves, getting to read one where they already do is truly exhilarating. Crow is a fantastic foil (and potential love interest?) - clever, moody, and full of secrets. I loved seeing him and Zephyr match wits. Writing is fast-paced, and evocative, with plot twists furling out with increasing urgency. And that ending! Ahhhh!

I'd also like to take the time to appreciate that notes in the back offer insight into the original Three Kingdoms story for curious readers, and there are a handful of gorgeous character illustrations in the front. (I, uh, wouldn't mind one for Crow in the second volume.)