The Call of Eirian — C. Aubrey Hall

Faelin twins Diello and Cynthe children of a Fae mother and human father found their lives changed forever the day their parents were brutally murdered by a goblin horde. They discovered that their parents cautious ways hid a lifetime of secrets, including Eirian, a magical sword buried on their farm. Now their little sister has been taken by someone who wants that sword and the ultimate power that comes with it. The twins along with their friends, a goblin boy and a talking wolf pup will have to journey to Embarthi, the realm of the Fae, and seek the family they have never known to find their sister and the truth about their parents mysterious past.