Breaking Up Is Hard to Do — Anne Dayton; May Vanderbilt

Ana, Christine, Riley, and Zoe have grown closer than ever over the past few months, but summer is over and it's time to put their friendship to the test.
It's been a little over a year since Christine Lee's mom passed away in a tragic car accident. Now her dad is engaged to Candace--"The Bimbo"--and Christine couldn't be less thrilled. When her attitude starts to take a toll on her schoolwork, the administration forces her to attend counseling sessions. At least she gets to skip gym class!
But with her father's wedding inching closer, Christine is growing even more bitter. To make matters worse, the Miracle Girls are beginning to drift apart. Christine's anger and the pressures of high school threaten to break the girls up when they need each other the most. Will they find a way to join together to help Christine come to terms with her mother's death . . . and her father's remarriage?