These days, more and more people are trying their luck in the world of online marketing. If you have been in this kind of business, you have probably heard of PLR or Private Label Rights products. PLR products include e-books, videos, templates, audios, software, and many other digital and e-products that you can sell and reproduce over the internet. And among all these e-products, one of the most popular is the e-book. One of the hottest trends now in online marketing is joining a PLR e-books membership sites. You might ask, what is this membership about?