New to B&N

[odedta]

Hello,

I am new to B&N, when I uploaded my validated ePub 3 this is the error I saw:

We were unable to import your Manuscript into our Editor. However, you can still publish the original uploaded file.

Is there a B&N publishing guide PDF like Apple's and Amazon's? do they even accept validated ePub3? any limitations I should be aware of?

So many questions... so little time...