I'm in agreement with the last contributor. I downloaded EzPDf reader from the Google Play store (£2.55 but you may find it cheaper elsewhere) then installed from the disk onto my laptop, copied the resulting file into my dropbox (there again, if you have things on your computer that you want kept safe Dropbox is brilliant - and simple to use)and then from Dropbox onto my Nexus 7. It takes a while, depending on the speed of your internet connection, but by that evening I was laying on my bed, with a glass of chilled rose wine listening to Jane's soothing tones and patting myself on the back for not getting it wrong.
And as I said before, now I can see where I've been going wrong all these years! Videos were brilliant quality and you can change the text size to suit your eyesight. Brilliant!!