Came across this book on subject:

The Things They Cannot Say: Stories Soldiers Won't Tell You About What They've Seen, Done or Failed to Do in War

Available on Kindle.

It has received good ratings... but for me IMHO it is written to entertain which for me is a distraction (somewhat like Bing West's 'The Village'). But nevertheless a welcome contribution.

Another book: Soviet Afghanistan Veterans Share Their Stories, Make Predictions. Comparison of Soviet (1979-1989) and American battlefield experience in Afghanistan (Warfare in Afghanistan: Now and Then) [Kindle Edition]

Short and sweet and worth the few dollars for the Kindle version.

Comparing their experience to what they see ISAF/NATO doing:

Andrei : “This is my personal view. Compared to our military campaign in Afghanistan, they’re effectively just maintaining presence. They don’t carry out any large-scale operations, like we did. They don’t even fight drug trafficking.”
Andrei has a point.