Three ten graders (Maddie, Angela, and Zoe) struggle through the first half of tenth grade, dealing with crushes, flirty teachers, parties, and the usual misadventures of a YA novel, with the twist that the entire story is told through their IMs.
It's a cute concept, but hard to read. It took me about 40 pages to really get comfortable with the format, and then get somewhat familiar with the three characters, who have a tendency to merge together in the mind until they start really doing different things. The trouble with IM is that it establishes a lot of distance from the characters so that you really don't establish much of a connection with any of them. Basically, you're reading a long conversation, without ever really getting inside their hearts and heads.