"A joy to read!"" —New York Times bestselling author Margaret Peterson Haddix

Child genius and budding inventor Frances is in trouble. Her dreams of scientific glory were dashed when her first big experiment nearly destroyed her whole town. So when a prestigious society invites her to their symposium, Frances sees it as a chance to redeem herself.

On the way there, her train is hijacked, and she and her friend Luca flee into the Black Forest. Seeking shelter with a group of orphans, Frances learns the rules of the woods: Never travel alone. Never make a sound. Because something hunts in the shadows, something with glowing eyes and sharp teeth.

Frances is no stranger to monsters, but she quickly learns there are forces more terrifying than she ever imagined...and that the key to defeating them might lie in her own scientific discoveries. With Luca and the orphans at her side, Frances must again face the horrifying, this time determined to stop evil and make a name for herself, once and for all.

Filled with friendship, humor, daring deeds, and a spunky main character who will definitely steal your heart, this historical fantasy is perfect for fans of Serafina and the Black Cloak and Greenglass House.