The Summer Palace by Kristen Painter

Newly crowned queen of the Radiant fae, Sparrow “Ro” Meadowcroft has two goals. First, to show her fae subjects that despite growing up in the mortal realm, she plans to honor the customs and practices of her new world. Second, to reunite the Radiant fae with the Grym fae. Or at least broker peace between the two estranged kingdoms.
How? By returning to the Summer Palace, an old tradition that once brought both kingdoms and their rulers together for a time of relaxation and fellowship. She’s invited the ruler of the Grym, too: Queen Anyka
Ro hopes the neutral ground of Willow Hall will provide a fresh start and a chance at diplomacy, but the old palace holds dark secrets that could mean the end of the Radiant fae. Or a new day for the Grym.

Can Ro win Anyka over or has too much blood already been spilled? And why does Willow Hall seem like the start of more trouble? All Ro knows for sure is that magic abounds in the Summer Palace. And not all of it’s good.