Vengeful Darkness by Sarra Cannon

You never know who’s watching from the shadows…

For centuries, the Order of Shadows has terrorized the Shadow World and manipulated witches with its thirst for power. But as Harper races to find a way to save the ruby priestess and set the ruby demon gates free, an attack more terrifying than anything they’ve ever faced cripples the entire Resistance in an instant.

Meanwhile, the twins are heading straight into a storm that threatens to destroy everything. And what they find on the other side will change them forever.

In the demon city of Leuxia, Princess Lazalea follows a series of mysterious clues that lead her to a shocking discovery and a staggering loss.

All along, they’ve believed the Order itself was their greatest challenge. They’ve fought with everything they had just to survive, but now, their real enemy will be revealed.

And the truth will bring them to their knees.