The Third Angel, by Alice Hoffman

Maddy is so jealous of her older sister, she takes great glee in sleeping with her sister's fiance. Her sister has written a successful children's book based on a story their mother used to tell them when they were little about a blue heron and his two wives; one is an earth wife, and one is a heron wife. This theme is intertwined with the story; differing points of view are taken by different characters, who pop up throughout the book. Hoffman at her best; recommended for book clubs. Lots to discuss here.