London, England
Harry Potter and the Deathly Hallows was published worldwide.
Harry Potter and the Philosopher's Stone was first published in London, England by Bloomsbury in 1997.
Harry Potter and the Sorcerer's Stone was published on the 1st of September. It was released by Scholastic Publishing in New York.
Great Britain
The second Harry Potter book, Harry Potter and the Chamber of Secrets, was published in 1998.
The lastest (and last) Harry Potter book is Harry Potter and the Deathly Hallows. It was published in 2007.
Harry Potter and the Deathly Hallows (2007) is the only Harry Potter book to be published after 2006.
I have a wild guess: Bloomsbury, London.
The first Harry Potter book, Harry Potter and the Philosopher's Stone, was published by Bloomsbury in the UK and Scholastic in the US, where it was retitled Harry Potter and the Sorcerer's Stone.
No, Harry Potter and the Half-Blood Prince was published in 2005 and Harry Potter and the Deathly Hallows was published in 2007.
Harry Potter was first published on September 1st, 1998 in the USA.
2007