A few years ago, trying to explain the difference between how books had weathered digital change compared to other media, I formulated the paradigm of the “unit of appreciation” and the “unit of sale”. The music business was roiled when the unit of appreciation (the song) became available unbundled from the prevailing unit of sale (the album). Newspapers and magazines presented individual articles that were appreciated within a total aggregated package that were the unit of sale. The ability of consumers to purchase only what they most appreciated shattered the business models built on bundling things together.
via Marketing the author properly is a challenge for the book publishing business – The Shatzkin Files The Shatzkin Files.