Seconded - if you like Maria V. Snyder you'll enjoy this,
This review is from: Child of the Ghosts (Kindle Edition)
I agree completely with the reviewer who said that Child of the Ghosts is very similar in tone to Maria V. Snyder's study series (though unlike her work there is no great romance).
Moeller world builds very well, and his characters are well drawn. The plot isn't particularly original or surprising, the heroine comes from a difficult family background and after her beloved father is killed and she is tortured by the evil wizard she trains to become an assassin and goes on to save the day.
I like the way that Moeller spent a great deal of the book focusing on Caina's training, allowing the reader to follow the development of her character and her character's skills, she doesn't just instantly become a deadly assassin. Along side this Moeller weaves details of what the evil wizard is up to, and it culminates in an exciting confrontation.
Overall, a well written book that I would recommend.