The The rise of magicks (Chronicles of the One, bk. 3)

"After the sickness known as the Doom destroyed civilization, magick has become commonplace, and Fallon Swift has spent her young years learning its ways. Fallon cannot live in peace until she frees those who have been preyed upon by the government or the fanatical Purity Warriors, endlessly hunted or locked up in laboratories, brutalized for years on end. . . Strengthened by the bond she shares with her fellow warrior, Duncan, Fallon has already succeeded in rescuing countless shifters and elves and ordinary humans. Now she must help them heal--and rediscover the light and faith within themselves"--OCLC.