The misunderstanding that these were the names of the new Harry Potter books took place when journalists checked what names were owned by Warner Bros.
Those journalists assumed (wrongly) that these must be unpublished titles.
JK Rowling has said in the past that the whole Harry Potter saga fits neatly into seven books, one for each of Harry's years at Hogwarts School of Witchcraft and Wizardry.
And if she ever did write an eighth book, then it wouldn't be another adventure, but a book for charity which would be the encyclopedia of the Harry Potter world.
At the moment JK Rowling is putting the finishing touches to the fifth book Harry Potter and The Order of The Phoenix.
The film of Harry Potter and The Chamber of Secrets will be released next month.