J.K. RowlingJ.K. Rowling finds herself in the middle of a plagiarism lawsuit, EOnline.com reports.

The 'Harry Potter' author has been added to the 2004 suit against her British publisher Bloomsbury, which claims Rowling stole the idea for the fourth book in the series -- 'Harry Potter and the Goblet of Fire' -- from a 1987 children's novel, 'The Adventures of Willy the Wizard: No. 1 Livid Land,' by Adrian Jacobs.

"I am saddened that yet another claim has been made that I have taken material from another source to write Harry," Rowling said in a statement.