The Shattered Mask: Forgotten Realms: Sembia, Book 3 (Unabridged‪)‬

When Shamur Uskevren, the matriarch of one of Sembia's oldest and most powerful merchant families, is tricked by an angry wizard into an assassination attempt on her own husband, her family is thrown into turmoil. Once the truth is discovered, she and her husband must struggle to save their family and stop the sorcerer. But in her anger, she has forgotten one thing: in the world of intrigue and deception, of shadows and lies that is Sembia, nothing is ever what it seems.