On Silver Winds by Ava Smiddy

A reluctant Heir. A vengeful King. An alliance that could ruin them both. Adeline never wanted the crown, yet she remains bound by it. A daughter of the Snow Queen, she must uphold the sparkling reputation of her kingdom until she earns the right to campaign for the throne - or the right to concede it. But when royal tensions split the frozen lake at the heart of the kingdom, a dark King claws his way free of its icy depths. And history is rewritten. Kai has spent an eternity beneath the ice, with nothing but his rage to keep him warm. Now his only path to freedom lies in a false alliance with the descendants of his enemy. Deceiving them might be simple, even satisfying - if it weren’t for the lovely, roguish Princess Adeline and the warmth in her eyes when looks at him. As though she wants him. As though she trusts him. As though he could want and trust her too. With loyalties divided and secrets buried in ancient ice, Adeline and Kai must decide how far they’ll go to protect the futures of their people. Is a kingdom worth the price of a frozen heart?