Defying Destiny - Divine Destiny

In 2042, twenty-year-old Sierra Stone leads a group of Irish rebels in an attempt to stop Hunter and River Wallis from conquering the planet. With her rebel forces severely outnumbered and unable to match the Wallis' weaponry, country after county falls to the powerful brother-and-sister duo, but Ireland refuses to surrender. Until Sierra is captured by the enemy.  Imprisoned in an ancient castle, Sierra faces the biggest challenges of her life.
River Wallis wants her dead, and Hunter wants to win her heart. She knows how to fight River, but her battle skills prove useless against Hunter's charm. Now, Sierra must decide if she's fighting for her personal freedom or for world peace. No matter what choice she makes, one thing is certain-for the first time ever, the Irish rebel may face defeat.