Second Sons, book 3: Lord of the ShadowsJennifer Fallon2004

Darkness threatens Ranadon again in the form of an eclipse. The Goddess wants to give the people of Ranadon a sign - and only Dirk Provin can interpret it. To do so, Dirk has systematically betrayed his one-time allies to join his most hated enemies. Now, with neither side trusting him, Dirk sets his own devious plot in motion

Senet's Crippled Prince, Misha, has found unexpected and tenuous sanctuary among the Baenlanders of Mil. To secure their trust, he offers them the one thing they cannot refuse. Meanwhile, Alenor, Queen of Dhevyn, betrayed by her husband, Kirsh, and Tia Veran, deceived by Dirk, set out for revenge and to finally free their people at any cost. As the second sons and the rest of their generation
pursue different paths to survival and freedom, they discover that the will of the Goddess - and of men - works in mysterious ways. And as Dirk's old enemies join with new ones, his attempt to save Ranadon may cost him his friends, his love...and his life.