[ponow]

It's as fair that you can refuse to pay $60 as it is for the author to ask for it. It strikes me that most people who would pay $30 would also be willing pay $60 in this instance, as it's not as if many new C books are coming out nowadays. So I'm guessing that the author will do better at $60. Medieval notions of profit and the physical costs are mostly irrelevant, but the effort and expertise of the author are not.

[tzjmetron]

It's not about the absolute cost. $60 in a developing country is a substantial sum of money.

[jfkebwjsbx]

So? Should we price everything according to developing countries? Then only those living there could produce things.