Plague of Shadows by Michael Wisehart

Synopsis:

As magic’s influence spreads across the five kingdoms, the White Tower’s reach extends with it.

No place is left untouched.

In his quest for vengeance against the witch Mangora, Ty stumbles across a curious book he believes might help. But its pages hold a dark secret that threatens to unravel everything his family and friends have been fighting for. The more he reads, the more addicted he becomes to the knowledge it offers…

With no memory of who he is or where he came from, Ayrion finds himself traveling with a pair Rhivanni tinkers as they head east toward Sidara. Then a plea for help from a young rover boy leads them into the middle of a horrific bloodbath against an enemy no one has seen in over a thousand years. If they aren’t stopped, these creatures will spread across Aldor, leaving nothing but destruction in their wake…

As the first prisoner to escape the clutches of the White Tower, Ferrin’s only concern is reaching his sister, Myriah, before the Black Watch catches him. Joined by Rae, her daughter, Suri, and a former captain in the Black Watch, the small band makes their way north, hoping to keep ahead of the white riders. Little do they know who has been sent to track them down…

Meanwhile, Kira and the Warren underground continue their search for Reevie as they attempt to discover the reason behind the strange disappearances in Aramoor. However, the answers they seek are more disturbing than anything they could have imagined…