In the book Double Identity by Margaret Haddix how does it end?

In "Double Identity" by Margaret Peterson Haddix, the story ends with the main character, Bethany, discovering her true identity and the truth about her past. She learns about the mystery surrounding her family and finds closure in understanding her past and who she really is. The ending provides a sense of resolution and a new beginning for Bethany as she comes to terms with her identity and moves forward with her life.