Guess what I got in the Mail? I'll give you Four Hints

I got something in the mail yesterday. 

It's skinny...

It's got shiny parts...

It's got pretty words...

It's got a high-tech doohickee...
I don't know what this means. Is it a map of the Underworld? Is it a hidden message from the Cybermen?
Can anyone guess what I got in the mail?

It's an actual jacket cover! 

I believe if you stare at the app bar code long enough, you might be transported to the Everneath. Or maybe I don't understand apps. Or bar codes.

So, what's everyone doing this weekend? Are you going out of town? Are you going to stare at the app bar code until you see a hidden image? If you do, tell me what it is!