Abby's Un-Valentine (The Baby-Sitters Club #127) | Ann M. Martin
Valentine's Day is Abby's least favorite holiday. Mushy stuff like valentines, red hearts, and a school dance turn her into a Valentine's Scrooge. When Ross Brown, a perfectly nice guy in Abby's English class, invites her to the dance, Abby tries to set him up with her twin sister, Anna.