Here's why:
* 800: This category represents Literature.
* 820: This category represents English and Old English Literature.
* 823: This category specifically covers English fiction.
Since "Dragons and Beasts" suggests a fictional story, it falls under the category of fiction.
Important Note: While 823 is the most likely placement, the specific Dewey Decimal number might be slightly different depending on the content of the book. If the book focuses heavily on fantasy elements, it might fall under 823.91, which is for Fantasy Fiction.
To find the most accurate Dewey Decimal number, you would need to examine the book's content and subject matter in more detail.