As technology disrupts the business model of traditional publishers, the industry must imagine new ways of capturing the value of a book. A business idea only has commercial value when the market” accepts it. The second principle of a successful business idea, therefore, is that it shows how large the market is for the product or service offered, for which target group(s) it is meant and how it differentiates itself from the competition. Simultaneously the character of the retailers engaged in the business of retailing literature shifts away from ones where price and breadth of selection are central toward ones…