Graceling (Graceling Realm, 1)

In the Seven Kingdoms, some are born with a Grace, a special talent that can set them apart. But for Katsa, her Grace is a curse. Identified by her mismatched eyes, she possesses the terrifying skill of killing. Since she was a child, her uncle, the king, has used her as his personal enforcer, a brutal instrument to bend his subjects to his will. Feared and isolated, Katsa secretly defies him, using her abilities to fight for justice with a small, trusted council. She believes her life is set on this violent path, defined by the power she never asked for.

Everything changes when she meets Po, a foreign prince whose own combat skills rival her own. Their encounter sparks an unexpected partnership, leading them on a journey to uncover the truth behind a sinister plot that threatens all seven kingdoms. As they delve deeper into a web of secrets surrounding a manipulative monarch, Katsa begins to question everything she's been told about her Grace. She must confront the true nature of her power not as a weapon of destruction, but of survival, and decide whether she can escape the future others have chosen for her to forge her own destiny.