Mara Valentine is neck and neck with Travis the misogynist jerk to become this year's valedictorian. She's got just the right mix of classes and extracurriculars and she's been already accepted (early decision) with Yale. She's got it made. That is, until her messed up niece (only a year younger than her -- LONG story) comes to live with them. Soon the adventure begins.
Mackler writes good books. The Earth, My Butt, and Other Big Round Things is truly a major achievement. This book will capture interest as well. But it is not in the same class. It has great characters and fun adventures, but nothing really stands out in it. I wouldn't toss it out and I certainly enjoyed reading it, but it won't blow you away either.