A Prison of Ink and Ice: A Snow Queen Retelling (Wicked Darlings) by Rebecca F. Kenney

What happens when the fated mates doubt their destiny and go through the most brutal kind of marriage counseling thanks to a villain? In this Snow Queen retelling, Lir and Louisa endure a hellish experience on their way to that happy ending. (This is a short novel in the Wicked Darlings series. It is concurrent to the events of book 2, "A Court of Hearts and Hunger," and it contains spoilers for books 1 and 2 in the series.) As the King and Queen of the Seelie Court of Delight, Lir and Louisa travel to the prison of Griem Dorcha to hear the cases of the Unseelie Fae that Drosselmeyer freed from his mansion. But when their journey takes an unexpected turn, they are trapped in an icy stronghold and forced to play a twisted game. As the stakes rise higher, Louisa must confront her deepest doubts about her marriage and her worst fears about life in Faerie--as well as some harsh truths about herself.