The Onyx Ring - The Family Relics Trilogy, #2

Jasmyn blames herself for her family's tragedy, and she's confident her family blames her too. The guilt is too much to bear, so instead of returning home, she joins her coven to focus on developing her grandmother's magic. Logan understands Jasmyn's pain and respects his sister's desire to live apart, but he doesn't stay away for too long. An enemy clan of sorcerers claims Logan as one of their own, and the mysterious bond of an ancient brotherhood takes hold of him.
An age-old rivalry between Logan's clan and Jasmyn's coven reawakens, and the violence it unearths threatens all they hold dear. Will Logan reject the brotherhood to protect his sister, or will he fulfill his clan's destiny and destroy Jasmyn's coven? With such opposing magical forces, even the tightest family bonds can break.