Harry Potter and the Chamber of Secrets seven books had been published, Graeme Davis regarded "Harry Potter and the Chamber of Secrets" as the weakest of the series, and agreed that the plot structure is much the same as in "Harry Potter and the Philosopher's Stone". He described Fawkes's appearance to arm Harry and then to heal him as a "deus ex machina": he said that the book does not explain how Fawkes knew where to find Harry; and Fawkes's timing had to be very precise, as arriving earlier would probably have prevented the battle with the basilisk, while arriving later would have been fatal to Harry
Harry Potter in the US on 2 June 1999. "Harry Potter and the Prisoner of Azkaban" was published a year later in the UK on 8 July 1999 and in the US on 8 September 1999. "Harry Potter and the Goblet of Fire" was published on 8 July 2000 at the same time by Bloomsbury and Scholastic. "Harry Potter and the Order of the Phoenix" is the longest book in the series, at 766 pages in the UK version and 870 pages in the US version. It was published worldwide in English on 21 June 2003. "Harry Potter and the Half-Blood Prince"