Harry Potter Book 4 Trivia and Quizzes. Harry Potter Book 4 20 questions Average, 20 Qns, Hermione2005, Jan 02 02. You better use your book if you have to! It's pretty hard, but not as hard as I wanted it to be, so be thankful. A quiz about the book Harry Potter and the Goblet of Fire , the fourth book in the series by J. K Rowling