Rowling wins US round of plagiarism battle

The claim, made by the estate of author Adrian Jacobs, alleged that the fourth Harry Potter book, Goblet Of Fire, was based on his work The Adventures Of Willy The Wizard.

But Judge Shira A Scheindlin ruled there were major differences between the two works.

Jacobs died in 1997 – three years before Rowling's book was published.

A spokesman for her US publisher Scholastic said they were "extremely pleased" with the decision.

He added: "The court's swift dismissal supports our position that the case was completely without merit and that comparing Willy The Wizard to the Harry Potter series was absurd. Judge Scheindlin clearly agreed, stating, 'The contrast between the total concept and feel of the works is so stark that any serious comparison of the two strains credulity'.

"Scholastic will continue to vigorously defend any such frivolous claims challenging the originality of Harry Potter and the brilliant imagination of its author, JK Rowling."

Rowling may still have to appear in a UK court after the High Court ruled in October the claim was "improbable" but still had a chance of success.