Interesting case.The author claims infringement of intellectual property, yet the book is based on the content of a fan site.
Also, to all intents and purposes an encyclopedia is a book of facts. Facts, as we all know, are not subject to copyright. Surely then, any facts about the characters and storylines cannot subject to copyright. True?
And what about the content of the fan site? Derivative work? It's certainly not plagiarism. And if the stuff has been online and the author has not objected, could this be construed as her being accepting of its existence.
Indeed, it appears she has no objections to the online content, but does mind to it being collated and presented in book form.
So what's the difference between the content being on a website or in a book?