A Baron of Bonds (Conduit of Light Trilogy #2) by Chelsey Tompkins):
 
I breathe, you breathe. Ready?

Karus has lived the past seven years as a shell of the channeler she once was. Now that her memories have returned, she has choices to make that will change the lives of the people she loves and inevitably, all of Arcaynen Isle.

Revich’s unwavering hope that his love would return has been fulfilled, and as he begins to heal from a past without her, a threat looms over his power and life as the Baron of Felgren.

While Karus and Rev navigate their bond and roles in the forest, a dark presence wields more influence over their lives than they could possibly know, tangling into their present and forging a path to their future.