Now I can congratulate myself, 'cause the parcel with 7 books is now in my hands ^^ I've taken it from my post office about 30 mins ago.
And, lol, I now understand why they are called "Light" novels - they are actually small and thin, compared to usual US and Canada books.
By the way, I do not what the paper is made of, but its' quality is like a premium one.
Nya ^_^