The seventh book, 'Harry Potter and the Deathly Hallows', is due to be released later this month and Rowling insists it will be the last.

Two characters will also be killed off in the book - with wizard Harry being one of the favourites to die.

However, British bookstore Waterstone's are urging fans to sign their petition to help save the teenage sorcerer.

The petition, which can be found at www.waterstones.com/saveharry, reads: "We, the undersigned, petition J.K. Rowling to write more new adventures for Harry Potter and his friends no matter what happens at the end of 'Harry Potter and the Deathly Hallows'."

Waterstone's spokesperson Wayne Winstone added: "We're not asking J.K Rowling to start another novel tomorrow we're just asking that she doesn't rule it out."

Meanwhile, Daniel Radcliffe - who plays Harry in the film versions of the books - fears his character will be killed off.

He said: "I think I might die in the final book. That's just my prediction. I think so, but I've no idea at all - I have no inside hints!"

(C) BANG Media International