MSReader and Adobe Reader Ebooks are in fact "binary sequences" ... any electronic file is that. That does not speak to the realities of the supply chain, or the costs to get it in there.
If it was just sold through my own web site, the price would be less. To begin with it was. But, when Amazon, WHSmith, PocketPCPress, Barnes & Nobles and others began picking it up and adding their costs, and the costs of the distribution ... the price adjusted upwards. I hope the volume goes up to a point to warrant the price coming back down. Time will tell.
Hope this helps answer yyour question.