A secret history of witches

"From early 19th century Brittany to London during the Second World War, five generations of witches fight the battles of their time, deciding how far they are willing to go to protect their family, their heritage, and ultimately, all of our futures. After Grand-mère Ursule gives her life to save her tribe, her magic seems to dies with her. Even so, her family keeps the Old Faith, practicing the spells and rites that have been handed from mother to daughter for generations. Until one day, Ursule's young granddaughter steps into the circle, and magic flows anew"--