The Pretender Princess — Robert L. Collins

Shell is a girl of the streets when the Baron of Falls Mouth has her brought to him. He teaches her manners and tells her she is Princess Rebecca, thought to have been murdered years before.This takes her to a battlefield, the center of the kingdom, and life in the castle, but not as a Princess. But curiosity has a hold on her, and knowledge has kept her alive. By always asking questions and finding answers, she might overcome her reputation as a pretender Princess.