Printing from PC Kindle App

[shed driver]

I've bought a WW1 regimental diary from Amazon for my Kindle. It's not compatible with my handheld kindle, but is with the PC version. Other than screenshots of individual pages is there any way of exporting a few pages to either print or to manipulate contrast etc in a graphics programme. The pages are scans of handwritten diary entries and some are rather faint in places.

SD.