The book features doodles and comments added by Ron Weasley. The comments would appear to have been written around the time of the fourth book, "Harry Potter and the Goblet of Fire". These doodles add some extra information for fans of the series (for example the "Acromantula" entry has a comment confirming that Hogwarts is located in Scotland) along with comic relief (such as Ron stating "you're not kidding" when talking about the Hungarian Horntail being the most fearsome dragon of all, a reference to Harry's encounter with one in the fourth book).