I'm Not Who You Think I Am

I'm Not Who You Think I Am is an American novel for young adults by Peg Kehret, published in 1999.

Plot
Thirteen-year-old Ginger becomes the target of a disturbed lady who believes that Ginger is her daughter. Ginger becomes distressed when the woman, Joyce, begins to stalk her. Joyce uses the help of her brother-in-law, while Ginger's parents are out of town, to speak to Ginger and convince Ginger to go with Joyce.

Reception
Kirkus Reviews finds "While the story reads like a thriller, the character development and moral dilemmas add depth and substance." while Publishers Weekly says "Thriller buffs may be disappointed by the thin characterizations and contrivances, ... most readers will want to stick around long enough to see how she escapes Joyce's clutches."