The Swap by Megan Shull

I've read lots of books involving changing bodies; Freaky Friday, Freaky Monday, Switch, Airhead and some I just can't remember. Swap stacks up favorably against all of these because Schull does a great job of developing the characters enough that the reader really feels the angst of living the life of someone else.
In Swap, a seventh grade girl, Ellie, is the brunt of some mean girl, ex best friend bullying, and she swaps with eighth grade Jack, whose home life since his mom died is anything but easy. An enjoyable read, which I predict, will be enjoyed by many middle school students wondering what it's like to be the other gender.