The Goffins Go Batty by Jeanne Willis
Walker Books ISBN 9781406308716
George is settling in to life at Grandma's house and his thoughts turn to having a pet. Along with Lofty and Eave, the Goffins secretly living in Grandma's attic, he sets upon giving a lost puppy a home. But can he convince the grown-ups to let him have a puppy? You too can go batty with the Goffins in this charming and hilarious story!