Exposure by Patricia Murdoch

Julie dreads going to school because her classmate Dana bullies and torments her at every possible occasion. When Julie learns of incriminating and embarrassing photos of Dana, drunk and half-naked at a party, she jumps at the chance to seek revenge against the girl who has made her life miserable. Following the Orca Soundings tradition, this title is a fast-paced, quick read. Julie, like Dana, is a highly unlikeable character and is so focused on her revenge that she loses sight of the important things. The moral of the story (revenge is not always sweet) is obvious and has been done before.