Willow Chance es una niña superdotada de doce años de edad, obsesionada con la naturaleza y el diagnóstico de enfermedades, y a quien le encanta contar de siete en siete. Nunca le ha resultado fácil congeniar con otras personas que no fueran sus padres adoptivos, sin embargo, eso no le había evitado llevar una vida tranquila y feliz… hasta ahora. De repente, el mundo de Willow cambia trágicamente cuando sus padres mueren en un accidente de coche, dejándola sola en un mundo desconcertante. Willow Chance is a twelve-year-old genius, obsessed with nature and diagnosing medical conditions, who finds it comforting to count by 7s. It has never been easy for her to connect with anyone other than her adoptive parents, but that hasn't kept her from leading a quietly happy life . . . until now. Suddenly Willow's world is tragically changed when her parents both die in a car crash, leaving her alone in a baffling world. The triumph of this book is that it is not a tragedy. This extraordinarily odd, but extraordinarily endearing, girl manages to push through her grief. Her journey to find a fascinatingly diverse and fully believable surrogate family is a joy and a revelation to read. "In achingly beautiful prose, Holly Goldberg Sloan has written a delightful tale of transformation that's a celebration of life in all its wondrous, hilarious and confounding glory.  Counting by 7s  is a triumph."—  Maria Semple , author of  Where'd You Go, Bernadette ,  on the English-language edition "Holly Goldberg Sloan writes about belonging in a way I've never quite seen in any other book. This is a gorgeous, funny, and heartwarming novel that I'll never forget." —  John Corey Whale y, author of  Where Things Come Back ,  on the English-language edition "Willow Chance subtly drew me into her head and her life, so much so that I was holding my breath for her by the end. Holly Goldberg Sloan has created distinct characters who will stay with you long after you finish the book." — Sharon Creech , Newbery Award-winning author of  Walk Two Moons ,  on the English-language edition Holly Goldberg Sloan  was born in Michigan and spent her childhood living in Holland, Turkey, Washington DC, California and Eugene, Oregon. She has written and directed a number of successful feature films. The mother of two sons, Holly lives with her husband in Santa Monica, California. She is also the author of  I’ll Be There , which won numerous young adult and best book awards.