Nameless queen

In the city of Seriden, everyone expected the king's daughter, Esther, would inherit the throne. Instead, it went to a thief called Coin. She is a Nameless-- no family, no legal rights, and no standing in society. In a palace where the corridors are more dangerous than the streets, Coin must make a name for herself. But how long can she keep the crown if everyone wants her dead? -- adapted from jacket