Soon to start Hogwarts? Feeling Nervous? Not to worry! I, Daphne Greengrass, can help calm your nerves. In this lighthearted book, you will find information and tips on Hogwarts, the best Wizarding school of all time. About the Author: Daphne Greengrass is a proud member of Slytherin House. She is a the Executive Assistant of the Head of the Department of Law in the Ministry of Magic and part time model for 'The Daily Prophet'. Hogwarts: The Unofficial Guide is Daphne's first book.