Originally Posted by scrapking
You're right, of course. But only to a certain degree. If consumers drive prices too low, it begins to affect what products and services they bother to even offer to them.
In this specific case it is, seemingly, a publisher determining at which pricepoint they can sell their ebook for maximum profit or ratings (?). $17.99 is the highest I have seen any ebook on amazon.com.
There is no turning back: if a publisher decides not to offer the electronic version of the book, they would more than likely miss out on income.