"Revelations" (Book 3 of 'Blue Bloods') by Melissa de la Cruz

Schuyler's lineage is called into question: Is she a Blue Blood or does the sinister Silver Blood run through her veins? Set in yet another exotic location -- Rio de Janeiro -- this story once again pits Schuyler against her nemesis, Mimi Force, while throwing her together with her forbidden crush, Jack Force. in a race to stop the threat to an ancient place of power. The stakes are high, the battle is bloody, and through it all, Schuyler is torn between duty and passion, love and freedom. 

Paperback in very good condition.