fifth book in J. K. Rowling's Harry Potter book series. It was one of the most widely-anticipated books of the series, since there was a wait of three years between it and the previous book, Goblet of Fire. At 38 chapters, it is also the longest book in the series, having jokingly been labelled as heavier than a refrigerator (by Stephen Fry at the Royal Albert Hall event) and used as a benchmark for the size of the next two books.