Book 7: Gossip from the Girls' Room: A Blogtastic Novel by Rose Cooper
Okay, this was a quick, cute read. A little Diary of a Wimpy Kid meets Harriet the Spy.
Sofia keeps a pre-blogging journal of all that she overhears in the girls' bathroom and then anonymously blogs about it, stirring up the gossip and concerns of her fellow middle schoolers. It's the non-popular kids verses the popular kids with the usual middle school embarrassments and pre-teen angst. A couple of twists wrap up this fast read nicely and leave Sofia wondering what boys talk about in the boys' room. Thus is born the follow-up book, Rumors from the Boys' Room.