Counting by 7s, Paperback/Holly Goldberg Sloan

12 year old genius Willow Chance is a unique child who likes diagnosing medical conditions, and finds it comforting to count by 7s. She's found it hard to connect with anyone other than her adoptive parents, but her world is tragically changed when they die in a car crash. This novel follows her journey to push through grief and find a surrogate family. Ages: 11+.