uhhh yes it was a book - a book of instructions of crafts. Yup - I held up the line.. sorry it was the principle of the thing. It was media - paper/binding - granted it was of a looseleaf variety -but a book with a copyright nonetheless.
You didn't specify that last posting. Here's the official word
Domestic Mail Manual (DMM)
Media Mail
Qualified Items
DMM E713.1.1a.
Books, including books issued to supplement other books of at least eight printed pages, consisting wholly of reading matter
or scholarly bibliography, or reading matter with incidental blank spaces for notations
and containing no advertising matter other than incidental announcements of books.
Advertising includes paid advertising and the publishers’ own advertising in display,
classified, or editorial style.