Dragon Duel

A 16-year-old named Chris Roberts had a normal day until outside of his chemistry class he finds a bird falling out of the sky. He asks to be excused and goes outside to check on the bird. Right, when he was right about to touch it he finds himself in a mid-evil world with a war raging against phantoms and humans. He soon discovers he has earth powers and is destined to be on of the fifteen element teens to end the war.
Book two: https://www.wattpad.com/story/48240558-phantom-blade
Warning part 2 is not finished