J.K. Rowling, the author of the beloved Harry Potter series, is facing a lawsuit claiming she copied substantial parts of her fourth book, “Harry Potter and the Goblet of Fire,” from a 1987 book by British author Adrian Jacobs called “The Adventures of Willy the Wizard – No. 1 Livid Land.” The lawsuit was filed in a London court on February 18, 2010 by Jacobs’ estate.

The estate claims that Rowling copied many ideas from “Willy the Wizard” into the “Harry Potter” books. For example, both books feature a wizard competition, in which the contestants must traverse a dangerous magical maze. In addition, both books feature a magical object that must be retrieved from the center of the maze. Furthermore, both books feature a character who is transformed into a ferret.

The estate also claims that Rowling copied the plot structure of “Willy the Wizard” into “Harry Potter and the Goblet of Fire.” Both books feature a series of challenges that the protagonist must overcome in order to win the wizard competition. In addition, both books feature a magical creature that the protagonist must battle in order to win the competition.

The lawsuit claims that Rowling’s copying of Jacobs’ work is “blatant and extensive.” The estate is seeking an undisclosed amount of damages from Rowling, as well as an injunction to prevent her from further infringing on Jacobs’ copyright.

The lawsuit has caused a stir in the literary world, as many people are questioning whether Rowling’s work is truly original. Rowling has yet to comment on the lawsuit, but it is sure to be an interesting case to follow.