Portal of the Hidden World- Ritaj H. Alhazmi

Another world means another war, another place, and another dream. What will happen to Natalya and Jame when they adventure to this new world? What evil will they find this time? And what is destined to happen to the two siblings?The siblings will have to hurry if they want to save the Fantasy World, as the heart gem is fading, and a world is yet to be conquered, which only they can protect.