The Buried Crown By Ally Sherrick

It's World War Two and Britain is on the brink of invasion. Londoner George has been sent to live in in the countryside while his brother and guardian, Charlie, fights overseas. But the war is closer than he thinks. An ancient burial ground nearby contains a priceless treasure, a magical Anglo-Saxon crown Hitler is desperate to possess. Alongside Kitty, the granddaughter of a Jewish archaeologist, George must find and protect the crown from the Nazi invaders before it's too late