The Iron King by Maurice Druon, translated by Humphrey Hare

This book starts in France with a sibling rivalry: the wives of Philip the Fair's sons are rumored to be unfaithful, and Philip's daughter Isabella, trapped in a loveless marriage to the King of England, wants to do something about it. But when the family is royal, the repercussions of a family fight are wide: they extend to the church and the very peace of the kingdom. I really enjoyed this book, which is historical fiction in the best French tradition and sets up a series clearly and compellingly.