If it's the enemies-to-lovers stories you like, then The White Princess is a great choice. Elizabeth of York, daughter of King Edward and now the heiress of the deposed York line, is forced to marry Henry Tudor to secure his claim to the throne. Their mutual loathing leads both of them to plot against each other and their allies, but the necessity of their positions brings them closer together as well. When a man appears, claiming to be Lizzie's long-lost brother and the true king, she's forced to decide where her loyalties lie: to her husband and their children, or to the man who might be her brother.