The Midnight Girls by Alicia Jasinska

Within a fiercely beautiful, cruel world, three young servants of three deadly witches change each other's lives forever. Alicia Jasinska's lush, darkly romantic The Midnight Girls is the subversive sapphic monster girl fantasy you've been waiting for. -Maya Gittelman, Tor.com In a snow-cloaked kingdom, two wicked rivals secretly compete for the pure heart of a prince, only to discover they might be falling for each other. Karnawal season is a time for mischief and revelry. For the next few weeks, all will be wintry balls, glittery disguises, and nightly torch-lit sleigh-parties. Unbeknownst to the merrymakers, two uninvited girls join the fun. Zosia and Marynka are drawn to each other the moment they meet, until they discover they're rivals, who both have their sights set on the prince's heart. If one consumes a pure heart, she'll gain immeasurable power. Marynka plans to bring the prince's back to her patron in order to prove herself. While Zosia is determined to take his heart and its power for her own. Their ambition turns into a magical contest with both girls vying to keep the prince out of the other's grasp, even as their attraction to one another grows. But their attempts on his life draws the attention of the city that would die for him, and suddenly their escalating rivalry might cost them not just their love for each other, but both their lives.