★ “Rellihan creates an appealing narrator. . .  An engaging story told from a convincingly tween-age perspective.”—Booklist, Starred Review

★ “The mystery will reel readers in, while the emotions and relationships make this a book to savor.”—Kirkus Reviews, Starred Review

“Debut author Rellihan adeptly renders Lou’s pain from her broken friendship.”—Publishers Weekly

★ “[A] pitch-perfect middle grade novel. . . . The mystery and plentiful conversation help keep the momentum going all the way to the end.”—The Horn Book, Starred Review

“Anne Rellihan’s Lou is one of the most authentic narrators I’ve read in years. Anxious, self-aware, and endlessly fumbling, but with such an enormous heart that it’s impossible not to love her. Not the Worst Friend in the World is a book about just how complicated friendship and family can be, and how much they both matter in the end.” —Laurel Snyder, author of My Jasper June

“This book has all the drama—family secrets, friendship breakups, and the painful consequences of one’s own mistakes. The slow reveal of mysteries kept me turning pages, while the vivid small-town setting reminded me of the best of Kate DiCamillo.” —Amy Noelle Parks, author of Kirkus and School Library Journal Best Book Summer of Brave