I recently purchased a tablet for Nook thanks to some Christmas $$ generosity. Very pleased for the most part. But did you know it's beyond my knowledge on how to actually learn a new song when using said tablet. Reason being, you can't see the whole page at once and so you're constantly starting and stopping. And imagine for a minute the finger speed of a 5-string banjoist trying to accomplish some sort of good sound from this situation. Nook, you fail! Miserably.
So please reconsider purchasing a music book for your *$#×! Nook. FYI when you print it on your printer, it's the same 2 inch size as your tablet.