There are many different manufacturers to produce e-readers,
they have different types,different functions and different drms.When you're considering buying a ebook, it's a good idea to make sure whether it has drm protection, what type the drm is, So you can know whether your ebook drm match the reader. before this step we have to look at how many drms there are and what exactly they are?
do anyone know some about e-book drms and e-reader
?