Steve Vanderark is a douche. She has been very gracious in letting fans play with her characters in their own works, as long as credit is given and is not for profit. Now he is jeopardizing that. Fan fiction will be a thing of the past if this guy is able to publish this book.
I don't care if Jo has a billion dollars, the characters are hers.
They do a good summary job of the lawsuit here.
JKR/WB Respond in Lexicon Suit - The Leaky Cauldron
People have put out speculation books and such before, but this guy is just plagiarizing and looking to make money off of using the HP brand.
"It counts 2,034 entries out of the book’s 2,437 entries that lift text directly from Harry Potter, and says the remainder “merely [add] adverbs such as ‘unfortunately,’ ‘sadly,’ or ‘possibly’ to descriptions.”"
He also neglects to site stuff lifted from other books.
Go Jo!