How do you remove the DRM from the Barnes and Nobel Ebook?

I have bought several EBook from Barnes and Nobel for my nook, I would like to be able to read them easily on my other devices. I know there is a way to remove the DRM from them I just can't seem to find anything that makes sense. If you know of a fairly easy way can you please direct me to it?|||You can refer to the step to remove drm protection.|||Just buy them from other locations in the first place such as www.ebookezy.com