If we are talking about an e-book version of the latest translation that was bought online and downloaded to an e-reader or other mobile device, then the question of ownership of the copy is not so simply answered. Unlike works published in print, electronic works are typically sold subject to agreements, in transactions that look less like an outright sale and more like a limited license.
I can’t wait to hear where sites like this one fall in terms of ownership and copyright law; Is curation an artistic process subject to some of the same privileges? My gut says so; I am adding value and perspective simply in the act of collection and filtration. Not sure about the courts, though.