Samantha is your average, all American Girl. She is stuck in the middle, with her older sister being popular and her younger sister being smart.
One day she saves the day by saving the president from an assassination, and suddenly she is the most popular girl at school.
It's written by Meg Cabot, who is an excellent author. I read this book not too long ago, and I thought it was really good. The story line was good, and Sam is a likable character.