It took me some time to find "Principles of Philosophy", thinking I had been short changed and had only received 'A Discourse on Method", until I realised that to find the "active menu" I had to go to the beginning and then scroll back. There are only two items on that active menu, namely 'A Discourse on Method" and 'Principles of Philosophy'. OK so if I want to be able to flick through a book and find my way then Kindle is not the thing to use, but really this is very primitive. Also I have the usual problem with a kindle edition - no reference to translator, date or translation, etc. So apart from anything else, I can't use it to reference quotes. I really do miss an introductory essay as well. So thumbs down for this.