Odhanan
Adventurer
Well, that's because they can afford it. They don't make their living on PDFs, nor do they think they're going to do so anytime soon. So they just put the PDFs at these prices. If some people buy them anyway, all the better for them. At least they're "there" already, so to speak.Well good luck to them selling individually licensed virtual copies for more than it costs to buy and ship a print copy of the book from any online vendor.