Electronic Chess Books?

I am looking for a PGN-based collection of famous chess games that has been extensively annotated by an expert.  I am still learning and it's too cumbersome for me to read hard copy books as I have to duplicate the moves on a board.  I can't see the board in mind yet and even the diagrams that are provided are too few for me.  Also, it would nice to randomly play the position from certain points against the computer.

Ideally books like "My System" by Nimzowitsch would just be transcribed into PGN.  Obviously not all of the text, but at least the parts where the author discussed his thoughts about the key moves and positions.

Is there such a thing as what I have described above?  It seems like such a simple thing.  I'd be willing to pay for the convenience but I suppose the concern is there is no DRM.

Thanks

There are 2. One called Monroi and the other is E-Notate

Wait never mind