Looks like another Histoire & Collections potboiler to me. In my opinion, they make nice pretty books, but have a tendency to 'invent' and 'make things up' if and when it suits them. I woudn't trust a thing I read in one of their publications.
I'd say the stuff in this book is authentic, just not very deep in detail.
IMO , an indispensable book for those interested in Soviet militaria.
Many general information