Child of the Ghosts by Jonathan Moeller

When her life is torn apart by sorcery and murder, young Caina Amalas joins the Ghosts, the legendary spies and assassins of the Emperor of Nighmar. She learns the secrets of disguise and stealth, of assassination and infiltration.
But even that might not be enough to save her.
For the evil that destroyed her family seeks to devour the entire world... From Goodreads.

This was an interesting and quite dark fantasy. Caina's mother renders the whole house useless with poor sorcery and hands over her daughter to an outlaw sorcerer in her quest for power. Caina survives the ordeal but joins The Ghosts in a quest both for revenge and in a effort to save the world.
I like that this book does not end on a cliffhanger, this story finishes. I will read more in this series at some point

This book qualifies for:
Goodreads Reading Challenge 2015
2015 Witches & Witchcraft Challenge
A Million More Pages Hogwarts: February Challenges (4/5)
A Million More Pages Hogwarts: Spring Fling
A Million More Pages Hogwarts: To Be A Ravenclaw
A Million More Pages Hogwarts: A Trip To Hogwarts
A Million More Pages Hogwarts: Diagon Alley Supply List