As Amazon Studios does with movies, Amazon Publishing feeds the content pipelines created by the tech giant’s online storefront and Amazon Prime membership program. At its most extreme, Amazon Publishing is a triumph of vertical engineering: If a reader buys one of its titles on a Kindle, Amazon receives a cut both as publisher and as bookseller—not to mention whatever markup it made on the device in the first place, as well as the amortized value of having created more content to draw people into its various book-subscription offerings. – The Atlantic