With the kerffule this week over the US Department of Justice’s case against Apple and the large publishing houses, it’s interesting to look at what an e-book should actually cost.

Amazon has been selling e-books at around $9.99, which was a price point that created a lot of traction for the e-book industry and saw it taking a large part of book sales, even increasing the number of books bought per reader per year.

However, since the introduction of the agency price model, facilitated by Apple, the price of e-books has risen. According to several media sources, Amazon was making a loss on the sales.

For many, it’s confusing as to how it is possible that an e-book can even cost so much; given that the marginal cost …