Catwin was a nobody a servant girl good at slipping into places unnoticed and unseen. Until she got caught by the Duke of Voltur and she becomes less than a servant she becomes a shadow assigned to the Dukes niece Miriel. Miriel is taught to seduce and win the heart of the king, where as Catwin is taught to use blades, poisons, and her bare hands to be able to protect Miriel at all costs. Even against the duke.
This book had everything mystery, intrigue, and suspense. You see two girls put through things that someone their age shouldn't ever encounter let alone endure. They act as though they accept the plans that surround them while at the same time quietly rebel.
This is a book I couldn't put down and I look forward to reading the other two books in the series.