Lydia Goldblatt and Julie Graham-Chang are best friends with one goal: to crack the code of popularity. Lydia's the bold one: aspiring theater star, stick-fighting enthusiast, human guinea pig. Julie's the shy one: observer and artist, accidental field hockey star, faithful recorder. In this notebook they write down their observations and carry out experiments to try to determine what makes the popular girls tick. But somehow, when Lydia and Julie try to imitate the popular girls, their efforts don't translate into instant popularity. Lydia ends up with a bald spot, their parents won't stop yelling, and Julie finds herself the number-one crush of Roland Asbjornsen. Worse, they seem to be drifting farther and farther from their goaland each other. Amy Ignatow's hilarious debut novel introduces the intrepid fifth-graders Julie and Lydia, whose quest to understand popularity may not succeed in the ways they want, but will succeed in keeping readers in stitches.