[jbinto]

That is true, the discount is only good for e-books.

I hardly even thought to make the distinction. These days, for technical topics anyway, the "e-" prefix is just as optional for "book" as "mail".

[jasonlotito]

> These days, for technical topics anyway, the "e-" prefix is just as optional for "book" as "mail".

No, it's not. If you sell me a book, and it turns out to be an ebook, that's a scam, and I'm getting my money back. Technical topics or not.