Shadow of the Mark by Leigh Fallon
Their love could destroy them all.
Through the ages, Marked Ones have harnessed the powers of the four elements: Water, Fire, Earth, and Air. Much about the elements is shrouded in mystery, but one thing is certain: A relationship between two Marked Ones has the potential to cause widespread devastation.
Megan and Adam—Air and Water—are determined to defy the risks.
But the power that swirls inside Megan is growing in twisted ways. And the closer she is to Adam, the closer Megan comes to unleashing a dark force that could spell destruction for the entire Marked line.