The Lotterys Plus One

Sumac Lottery is nine years old and the self-proclaimed "good girl" of her (very) large and (extremely) unruly family. And what a family the Lotterys is : four parents, seven children and a menagerie of pets, all living and learning together in a sprawling house called Camelottery. And then Grumps arrives. The Scottish grandfather Sumac has never met before is grouchy, confused and has just set fire to his own house.
He doesn't want to join his son's "weird" family, but he has nowhere else to go. Not only is Sumac chosen to be his guide, but she also has to give up her room for him. Can Sumac help him find a home where he truly belongs ?