Ghost Exile book 3. Spoilers ahead for the earlier books.
Caina finally gets a message about what to do. An assassin who can turn invisible complicates it, but she ends up with the knowledge that she needs to help the ambassador the Empire is sending: Martin. And his wife Claudia.
Assassins feature again. One is the Red Huntress, the legendary killer, while others are more of the invisible Silent Hunters, more limited.
It involves disguises as dancers, Claudia's disliking the local food, a pilgrimage, a weapon that can harm the Red Huntress, a friend from their visit to the maze in earlier books, bandits and their folly, and more.