If you're a super fan of the series or someone that is diving in and gets easily confused about the different bloodlines and creatures I would say this is the perfect book for you. This compendium contains just about everything you would ever need, even some character portraits. Even though Poppy was not as scarred as I imagined her when reading the stories. I did not read through this entire book, more skimmed it and read parts that I found interesting. I wasn't at all interested in Miss Willa's letters throughout, but that might be a draw for some!