Books Ko (BK) is really just a website catalog for my offline book business - which is 2nd hand books and other items - but since there is this electronic book business in the internet particularly PLR and MRR e-books - PLR stands for Private Label Rights and MRR stands for Master Resale Rights - I will Try my luck on MRR e-books or Master Resale Rights electronic books as additional to my 2nd hand books business.

Moreover, MRR e-books or Master Resale Rights Electronic Books are Legal book or have legality thus it is not harmful or illegal to sell upon receiving a rights and license.