I quite enjoyed this story of a very complicated friendship (with great character development) that changed over the years as the girls became women. While some are calling this a thriller I did not think it really fit that genre, although there are a few 'thrilling' parts to the story. Both of the main characters were flawed, with interesting backgrounds, but I really only found one of them unlikable. Thanks to NetGalley for the digital ARC. 4/5