Best Friend Emma — Sally Warner

As soon as Emma McGraw sees Krysten Rodriguez, she knows that Krysten would make a great best friend. There's just one problem. Emma already has a best friend -- Annie Pat! But Emma is sure she wouldn't mind if Emma made a new friend for both of them. And she has to do it fast, before Krysten is taken! Annie Pat should appreciate that, right? Actually, no. Not when Emma is forgetting important plans they've made together. Suddenly Emma is faced with the prospect of no friends at all!
At once charming, funny, and thoughtful, this fourth book about eightyear- old Emma is sure to find new fans.