The Damned King - Justin Lee Anderson (Book 3 of the Eidyn Saga)

The eternal light keeping demons at bay has been extinguished and Eidyn's last bastion is under brutal siege. Aranok and his allies draw the final battle lines as the war for the kingdom nears its end.

With death threatening from every shadow and truth itself at stake, Eidyn's defenders must put aside their grudges and come together. But is it possible to save everyone when some prefer the lie?