The Wall of Night series

Malian, Heir to the warrior House of Night, knows the history of her people: the unending war; the legendary heroes blazing with long-lost power; the internal strife that has fractured the Derai's former strength. Yet in the long stasis in the war between the Derai and their ancient enemy, she has known little of real danger—but now the Darkswarm is stirring again.

As the tide of shadow rises, Malian learns that she herself may be the key to both unravelling the Derai's fractured past and ending the war against the Darkswarm once and for all. But with opportunity comes danger—and Malian knows that if she accepts the offer of ancient power, she must also prepare to pay the price.