There was an article at BoingBoing.net last year, but I refer to it now, as today Portal.bg has published a Dnevnik daily article (note: in Bulgarian) about the problems Bulgarian face when they try to read/download books online, including books from authors who have died about 70 years ago…
The problem is that some publishing houses have bought the rights from the state or the authors, but some of their books have already been OCR-ed and published online, usually in plain text format.