When a stranger moves in... Isabella Ricci has found the perfect roommate. Quiet, clean and considerate, Lisa Fontaine is totally interested in Isabella's life. But maybe she's a little too interested... Lisa starts to dress and talk like Isabella, and instantly hits it off with all her Sweet Valley friends - especially Jessica Wakefield. But Lisa crosses the line when she takes Isabella's clothes, then cuts and dyes her hair just like Isabella's. Suddenly Isabella is scared. Lisa seems dead set on taking her friends, her identity - maybe even her life...
This book is part of the Sweet Valley University: Thriller Editions Books series and is book #6 in the series.