"A nice mix of humor and emotional pitfalls: the perfect script for an engaging read."—Kirkus Reviews

"Green sincerely conjures Violet’s deep pain, confusion, frustration, and worry over shifting relationships; her frank, energetic voice carries this sensitive narrative."—Publishers Weekly

"Kids who feast on friendship and family fiction will savor the bitter and the sweet."—The Bulletin of the Center for Children's Books

"Middle-grade readers will appreciate the realistic reflection of the social lives of 12-year-olds. Green doesn't shy away from Violet's own shortcomings, making her all the more sympathetic and relatable. The narrative keeps up a comfortable pace and weaves subplots adeptly in along with illustrations that demonstrate Violet's love of math. Recommended for readers looking to take a more serious and mature step past Diary of a Wimpy Kid." —Booklist

"HUMOR + HEART2 + PI = A GRATIFYING MUST-READ!"—Ernesto Cisneros, author of Efrén Divided

"A simplified yet worthy STEAM read where stories of middle school travails resonate."—School Library Journal

"Written with equal parts heart and humor, Violet’s attempts to use graphs, charts, and mathematical equations to make sense of shifting middle school friendships and an unexpected change in her family add up to a thoroughly engaging and relatable read." —Alyson Noël, #1 New York Times bestselling author 

"A warm story about a girl who learns to navigate her world with humor, courage, and heart. A sweet, funny, and thoughtful read with a healthy dose of STEM and pie."—Mae Respicio, author of The House That Lou Built