Circadian Circle

If saving the world meant descending into darkness, would you still do it?

In this gripping, action-packed conclusion to The Gray Tower Trilogy, vampiric warlocks are the least of Isabella George's troubles.

The Gray Tower is broken, and dark forces gather, promising destruction to those who stand on the side of justice. However, Isabella's powers could prove more a curse than a blessing, as she's thrust to the forefront of an epic war.

Between taming a rampaging Black Dragon, resisting demoni...