The Derishz Ruby

Carolyn is a simple girl from a simple town who can only dream of excitement - until Sarin arrives. When a young knight shows up one night from an alternate dimension, she learns her necklace, a family heirloom, is actually a powerful magical artifact and the only hope for the kingdom of Herin. She agrees to accompany him and assist in their war, learning magic, making friends, and fighting to re-open the way back home.