Blurb from Reviewsofbooks.com_

Holy Fools revolves around Juliet, one time acrobat and star performer of a circus troupe led by her lover, Guy LeMerle. Betrayed by him and pregnant with child, she seeks refuge in a nunnery off the Brittany coast and becomes Soeur Auguste. When the abbess dies, an 11-year old girl, niece of a powerful bishop, is appointed the new abbess. She arrives accompanied by LeMerle, disguised as a priest. As the two wield their evil upon the nunnery, Juliet must protect herself and her daughter. This novel is being hailed as one of Joanne Harris's best. Asian Review of Books says, "If you enjoy history, intrigue and characters who dance to life from the page, you'll enjoy Holy Fools."

intriguing book, full 17th century beliefs and mystery.
Found the end slightly disappointing but finished full of admiration for the author.
Have also read "Chocolat" and "Blackberry Wine"