Araphel - Daughter of Mars, #2

Sometimes, the best thing a girl has to look forward to is killing someone. When she learned the truth behind her father's death, Risa Black thought she'd given up on revenge. After an unknown enemy takes the life of someone dear to her, revenge is all that keeps her going. While hunting for the assassins, she uncovers a web of espionage and deceit that destroys her sense of everything she knew. Her idealism tarnished, her drive to free Mars from Earth gives way to something more personal: the need to protect a child.
It soon becomes clear she's in over her head. Consumed by the sorrow of loss, she accepts a mission from the Martian Liberation Front, not caring it's a one-way ticket. Desperate to uncover the truth hidden behind all the lies, she hopes to find answers in a place that should not exist: Araphel. The home of the angel Raziel.