<P> Rowling completed Harry Potter and the Philosopher's Stone in 1995 and the manuscript was sent off to several prospective agents . The second agent she tried, Christopher Little, offered to represent her and sent the manuscript to Bloomsbury . </P> <P> After eight other publishers had rejected Philosopher's Stone, Bloomsbury offered Rowling a £ 2,500 advance for its publication . Despite Rowling's statement that she did not have any particular age group in mind when beginning to write the Harry Potter books, the publishers initially targeted children aged nine to eleven . On the eve of publishing, Rowling was asked by her publishers to adopt a more gender - neutral pen name in order to appeal to the male members of this age group, fearing that they would not be interested in reading a novel they knew to be written by a woman . She elected to use J.K. Rowling (Joanne Kathleen Rowling), using her grandmother's name as her second name because she has no middle name . </P> <P> Harry Potter and the Philosopher's Stone was published by Bloomsbury, the publisher of all Harry Potter books in the United Kingdom, on 26 June 1997 . It was released in the United States on 1 September 1998 by Scholastic--the American publisher of the books--as Harry Potter and the Sorcerer's Stone, after Rowling had received US $105,000 for the American rights--a record amount for a children's book by an unknown author . Fearing that American readers would not associate the word "philosopher" with magic (although the Philosopher's Stone is an ancient tradition in alchemy), Scholastic insisted that the book be given the title Harry Potter and the Sorcerer's Stone for the American market . </P> <P> The second book, Harry Potter and the Chamber of Secrets, was originally published in the UK on 2 July 1998 and 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 was published on 16 July 2005; it sold 9 million copies in the first 24 hours of its worldwide release . The seventh and final novel, Harry Potter and the Deathly Hallows, was published on 21 July 2007 . The book sold 11 million copies in the first 24 hours of release, breaking down to 2.7 million copies in the UK and 8.3 million in the US . </P>

When was harry potter first published in the us