知らないアドレスからメールが！長文英語訳してください(>_<)

What is known is that Rowling has said the books would get progressively darker as Harry -- now entering his sixth year at the Hogwarts School of Witchcraft and Wizardry -- gets older and closer to his ultimate battle with Lord Voldemort, the series&#039; personification of evil.
But the books ... well, the books are in no danger of going wanting.

添付ファイル削除とも書いてました。意味分かる方いますか？