Amazon's self-publishing e-book platform appears to be overrun by spam or low-quality e-books. Of the thousands of digital books being published through Amazon's self-publishing system each month, many are spam, either developed via Private Label Rights or even using toolkits that help people produce e-books in bulk -- a process that does not involve actually writing an original word. Spammers and producers of low-quality content have inundated just about every digital channel available, starting with email more than a decade ago.