Thanks for the responses so far.
Edited OP to add...
I have no purchased or otherwise eBooks and have never used and eReader, so no legacy to integrate.
I would like to check out eBooks from the local library (which uses Overdrive).
Not really a comic book reader.
I heard B&N has superior kids eBooks.
Also I believe the Overdrive at the local library uses Kindle format.
Very confused at this point. It doesnt help that I dont have the Nook rooted yet (waiting on the microSD card). And I havent set up an account with B&N yet either.