The Ghost of Ivy Barn - Mark Stay

August 1940 As the Battle of Britain rages overhead, a warlock leader from the Council of High Witches comes to Woodville with a ritual to repel the imminent Nazi invasion. The only catch is it involves full-frontal nudity on the White Cliffs of Dover. The Witches of Woodville are having none of it, but when more witches arrive they realise they might have a spy in their midst, and it's up to Faye Bright to uncover the traitor. But she's got enough on her plate already with the ghost of a Polish Hurricane pilot who may hold the key to the truth. For fans of Lev Grossman and Terry Pratchett comes the third novel in this delightful series of war, mystery and a little bit of magic . . .