[solitaire]

I think that the original file is only password protedted and not DRM protetcted, which is why dynalmadman was able to convert it to pdb.

The fact that nook is asking for credentials is a known issue with the nook device, even with their latest firmware version (1.2.0).

My suggestion would be to try the pdb doc format instead of pdb ereader (this is a setting in calibre pdb output section) and see if that works.

HTH