Publishers vary by country. In the UK the series was published by Bloomsbury Publishing and in the US Scholastic published the series.
Harry Potter and the Deathly Hallows (2007) is the only Harry Potter book to be published after 2006.
Scholastic.
Harry Potter will appear in the Harry Potter books. If he was to appear in any other published novel it would violate copyright.
None, all the Harry Potter books have been released.
The Harry Potter books were first published by Bloomsbury Publishing and later, Scholastic.
Nobody. In the UK, Bloomsbury are the only company to publish the Harry Potter books.
Scholastic published most of the Harry Potter books including the Half-Blood Prince.
The 7 Harry Potter books.
All of the books in the Harry Potter series have been published, the last one was released in 2007.
Harry Potter and the Deathly Hallows was released in French on the 26th October 2007. Just over three months after it was released in English.
Seven. All the books have been released.
They aren't: all seven books have been published.