As the title implies, it is a guide to the different dragon species. Written like an actual guide book, with detailed facts and descriptions of each different dragons one may encounter in the realms. Additionally, there are many annotations made by the author, giving it a sense like a journal as well. Each page gives a description about what that dragon is, its statistics, its extremely long life cycle, and methods of combat. The illustrations also shown the dragons in their majestic glory, even with some hand-drawn by the author to give analysis on some of the aspects closer up.
While reading this, it appears that this was a supplemental book to another series, The Wayward Wizard, I believe. Overall though, I found the book enjoyable, but at times a little formulaic and repetitive because of the way it's formatted. Despite that, it was great to read a book that felt like it was immersing you into another realm.