The Children of the Aspects. The Song of the Sylvan, #2

As secrets and lies begin to unravel her world, Myrthe must choose between her heart or her duty. Haunted by doubts, Myrthe returns to Faelow, the home of her enemies. An encounter with the toxic blightborn has left her floundering for the truth, and the answers she needs will be easier to find in the human city than under the caring eyes of the forest. It's not a wise decision; it certainly has nothing to do with Ardin, who risked everything to save her from the monsters.
To stay in the city, Myrthe must continue to hide her identity as a sylvan-a guardian of the forest and enemy of all humans-and her growing feelings for Ardin means exposure could cost her more than her mission. But Ardin is hunting the same people who have the answers she needs. If Myrthe wants to discover the truth behind the destruction of her home and the blight, she'll have to join hands with him-but if she isn't careful, she may never want to let go.
Revenge was close; Ardin could taste its foul scent in his teeth-only for the Briarhearts to escape again. Following a scattering of clues, Ardin struggles to keep his soul together under the burden of more magic than any human should bear. Fortunately, Myrthe's abilities can help him, but it comes with a price-his heart. Every moment spent beside her, leaves Ardin sinking further into a warmth he hasn't felt for years.
But these distracting feelings may be fatal when his enemies will do anything to stop him from uncovering their part in the events of ten years ago-events he is realizing he never understood. In Faelow, lies grow thick as nettle and the ones that sting the worst come from those he trusts the most. The Children of the Aspects is the second volume of The Song of the Sylvan, a character-focused epic fantasy featuring a slow-burn romance between enemies on opposite sides of a centuries long war.