Heart of the Mountain

YA Fantasy Adventure in the lost realm deep under the mountain.
Twins Delvina and Retza's greatest desire is to be accepted as prentices by their parents' old crew when they stumble across a stranger. Trapped under the mountain, young Zadeki's only thought is to escape home to his kin. Peril awaits all three youngsters. Will they pull apart or work together to save the underground realm?
Book 1 in Under the Mountain series