Fanest;
There is a significant difference between a physical book and an electronic book. Even if there is a price difference in favour of the electronic version, which is not always the case, bookstores are not afraid of being made obsolete in the foreseeable future.
With computer games, once they are installed the delivery method is irrelevant. Manuals rarely get read, and if so only once, so there are much few people willing to pay a premium for that.
AlexF;
Retailers in a significant part of the market in the EU believe they can charge 40€ for a game, and since apparently some people are willing to pay that (since the retailers are still in business and still carrying PC games), they don't have much incentive to charge 30 or 35€. When people stop buying in significant enough numbers and tell the retailers that they are doing so due to unfair pricing, that may change (just the general trend of digital sales increasing and retail decreasing may be a more effective factor, if possibly slower).
Localization isn't directly related to regional pricing, but it is part of the reason Larian has signed distribution deals in the regions that they have. The distributors / publishers are handling the localization (and guaranteed a minimum number of sales), so Larian can focus on the game itself.
