Summary from Goodreads
Seventeen-year-old Bianca Piper is cynical and loyal, and she doesn't think she's the prettiest of her friends by a long shot. She's also way too smart to fall for the charms of man-slut and slimy school hottie Wesley Rush. In fact, Bianca hates him. And when he nicknames her "Duffy," she throws her Coke in his face. But things aren't so great at home right now. Desperate for a distraction, Bianca ends up kissing Wesley. And likes it. Eager for escape, she throws herself into a closeted enemies-with-benefits relationship with Wesley. Until it all goes horribly awry. It turns out that Wesley isn't such a bad listener, and his life is pretty screwed up, too. Suddenly Bianca realizes with absolute horror that she's falling for the guy she thought she hated more than anyone.THE DUFF was definitely a unique tale to read. Bianca was unlike any other person I've ever met, in fiction or reality. She was just so sarcastic, forward and kick-ass. Wesley was also wonderful. I like that, in the beginning, Bianca really does dislike Wesley and want to stab him. Bianca doesn't mince words in her narrations and the feelings honestly sneak up on her. Neither of these characters were predictable. Bianca didn't get all gushy and girly about Wesley and Wesley is smart and tries to explain logically his reasons for being the player that he is.
Another awesome trait for THE DUFF was the supporting characters. Jessica and Casey were the best friends a person could ever ask for and they each had a special relationship with Bianca. Toby was a contrasting person for Bianca to like. He was caring and understanding, but ultimately not the one for Bianca. These characters made for depth to the great book and kept me entertained along the way. The ending to THE DUFF presents the message of the book: that everybody, at one point in life, feels like the DUFF, but the word only has the power that you allow it.