The Goffins Lofty and Eave by Jeanne Willis
Walker Books ISBN 9781406308693
Spending the whole summer at Grandma's house is not George's idea of a good time. But when he explores Grandma's attic and finds an exciting secret among the family heirlooms and photographs, George stops being so resentful. As his new friends, the Goffins, let George into their world, he becomes more understanding and caring. Could there be a goffin in your attic?