Our castle by the sea

"England is at war. Growing up in a lighthouse, Pets world has been one of storms, secret tunnels and stories about seamonsters. But now the clifftops are a terrifying battleground, and her family is torn apart. This is the story of a girl who is small, afraid and unnoticed. A girl who freezes with fear at the enemy planes ripping through the skies overhead. A girl who is somehow destined to becomepart of the strange, ancient legend of the Daughters of Stone"--Provided by publisher.