A lightning strike gave her a superpower...but even a super genius can't solve the problem of middle school. This smart and funny novel perfect for fans of The Fourteenth Goldfish, Rain Reign, and Counting by Sevens.

Lucy Callahan was struck by lightning. She doesn't remember it, but it changed her life forever. The zap gave her genius-level math skills, and ever since, Lucy has been homeschooled. Now, at 12 years old, she's technically ready for college. She just has to pass one more test: middle school!

Lucy's grandma insists: Go to middle school for one year. Make one friend. Join one activity. And read one book (that's not a math textbook!). Lucy's not sure what a girl who does calculus homework for fun can possibly learn in seventh grade. She has everything she needs at home, where nobody can make fun of her rigid routines or her superpowered brain. The equation of Lucy's life has already been solved. Unless there's been a miscalculation?

A celebration of friendship, Stacy McAnulty's smart and thoughtful middle-grade debut reminds us all to get out of our comfort zones and embrace what makes us different.

An NPR best book of the year.

A Kirkus Reviews best book of the year.

"An engaging story, full of heart and hope. Readers of all ages will root for Lucy, aka Lightning Girl. No miscalculations here!" (Kate Beasley, author of Gertie's Leap to Greatness)