Book request: Would have been read somewhere between 2005 - 2008Two girls get stuck in detention together and have to work on a project. The one girl is quirky and is a misfit, the other girl has a solid group of friends. They work on the project in the library and after school. Slowly the two girls become friends, but the one who isn't quirky hides the friendship from her friends for fear of being teased. I have a vague memory that the quirky girl's name is some variation of Penelope or similar (could be totally off on that one) ENDING OF THE BOOK ---- SPOILER BELOWOne day the protagonist is swimming with the quirky girl and some of her friends come over (I can't recall if this was set up by one of her other friends who was jealous of the friendship) and everyone starts teasing the quirky girl. She then takes her own life by suicide. The end of the book is a letter written by the surviving girl processing the suicide of her friend.

Matching book description: There are those who are popular. There are those who are outcasts. And there are those who must choose between the two.Megan Tuw has always been popular. As a leader of her high school’s most cliquish group, she’s among the anointed girls who think nothing of ridiculing those who don’t fit in. That includes Perdita Wiguiggan—a classmate Megan and her friends openly refer t There are those who are popular. There are those who are outcasts. And there are those who must choose between the two.Megan Tuw has always been popular. As a leader of her high school’s most cliquish group, she’s among the anointed girls who think nothing of ridiculing those who don’t fit in. That includes Perdita Wiguiggan—a classmate Megan and her friends openly refer to as the Freak. But Megan doesn’t know the first thing about Perdita, since she would never dream of talking to her. Only when the two girls are thrown together in detention does Megan begin to see Perdita as more than someone with an odd last name, as more than the school outcast. And slowly, Megan finds herself drawn into an almost-friendship.Then Megan faces a choice: Perdita or the group?From the Hardcover edition. ...more