La Marea Negra (Las Crónicas de la Bruja Negra, 4)

The black tide is unstoppable... Now that everyone knows she is the Black Witch of prophecy, Elloren Gardner has fled, unsure whether she will find friends or enemies along the way. Now that her mate, Lukas Grey, may be dead or in the hands of the High Mage Marcus Vogel, Elloren knows that the only way to turn the tide of the coming war is to find allies willing to listen to her instead of murdering her in cold blood. In the Kingdom of the East, the water fae Tierney Calix and Elloren's brother Trystan have joined the Wyvernguard and are preparing for Vogel's attack. But Trystan is fighting on two fronts, for he is the most hated and distrusted member of the guard. And Tierney's connection to Erthia's most powerful river has revealed a danger more terrifying than the impending war.