I have a 600 page PDF that I call an intent from a previously installed PDF application to view. The app works fine but I have received complaints that it is just a PDF. I would like to know is there an optimal way to display a file such as this (two columns with images) in a way that it is viewed by the user in the best (mobile?) format possible? Hopefully an automated tool, converting to word and manually changing it is a daunting task.

As I said above the app already has the ability to view the PDF file. I wanted to know what the best mobile friendly format was.