Unquenchable - The Serendipity Duet, #2

Nell Massler is a powerful witch from an ancient magical family. Before she was eighteen years old, she attempted murder-not once, but twice. Committed to a psych ward, she attempts to right her wrongs and almost loses her life. While she's lost in a coma, Caruthers Initiative Institute develops a vested interest in waking Nell-and offering her a chance at redemption. Nell is given a fresh start in exchange for saving her fellow agent, Rafe Brooks.
Keeping him alive and in hiding will require every ounce of her extraordinary abilities. Not falling head over heels for the sexy mind manipulator will take a miracle. It's when they uncover a plot to destroy the world that Nell will be put to the test... will she choose Rafe and to do the right thing? Or will she succumb to the temptation of evil yet again?