Blood Debts by Michael J. Benton

Set in a world where ancient grudges and family secrets intertwine, this gripping tale follows two estranged siblings who are thrust into a dangerous quest to uncover the truth behind their parents' mysterious deaths. As they delve deeper into the shadowy underworld of their city, they must navigate treacherous alliances and confront long-buried betrayals. With time running out and enemies closing in, the siblings must reconcile their differences and harness their unique abilities to unravel a conspiracy that threatens not only their lives but the very fabric of their society.