Octavia Leander, a young healer with incredible powers, has found her place among Miss Percival's medicians-in-training. Called to the frontlines of a never-ending war between Caskentia and the immoral Wasters, the two women must uncover the source of a devastating illness that is killing thousands of soldiers. But when Octavia's natural talents far outshine her teacher's, jealousy threatens to destroy their relationship—as time runs out to save the encampment. Fans of Beth Cato's debut, The Clockwork Dagger, will love this journey into Octavia's past—as well as an exclusive excerpt from the sequel, The Clockwork Crown!