Ghost Aria (World of the Ghosts short story)

Sixteen years old, Caina is a student of the Ghosts, the spies and agents of the Emperor of Nighmar, and from them she learns the arts of stealth and infiltration, of disguise and intrigue.

But when a man dies of a mysterious poison, Caina faces a deadly test.

Because if she doesn't solve the murder, she might die next...