Make a HTML document with javascripts that are blocking text marking and right clicking. Surely, you can always view source, but imo that'd be the best solution. That + the True Crypt read-only thing.
If there was a such thing as DRM for documents, that'd be your way to go, but I don't think it exists.
If there was a such thing as DRM for documents, that'd be your way to go, but I don't think it exists.