I only included the titles of the books as examples of making it obvious he is using an auto-translating tool. If you can prove that he has plagiarized from either of those books, then yes, please report it and get him banned. I don't think he has however, or at least, not from the English versions. He may well have from the Spanish versions, but I don't speak a word of Spanish and reverse translating from his garbled English won't get me back to exactly the same as the original. Hence my appeal for a native Spanish speaker.