It's a book called Les Guerriers de l'Hiver (Winter Warriors) by Olivier Norek who was a cop before he started writing fiction.
Apparently his first book was ok. It was about humanising migrants who were stuck at the French border, so I guess he's not a literal racist but rather "rabid liberal sides with nazis when talking WW2"
Nonetheless the book is just glorifying the Finnish and depicting Soviets (well, he calls them "Russians" all the time lmao) as a zombie horde. It's all about how the "White Death" guy was a hero. I randomly opened a page and I kid you not first thing I read was "-Will we be free after that?" "-Well as free as one can be in Russia" 
Very cool mister anti-racism cop, and thank you to my fellow social democrats for thinking I wanted to read the most clownish anti-soviet propaganda by some lib who's got zero background in History
I think by the time they started going with that angle, the situation had reached a point where they couldn't possibly deny the size of the Russian army, so they had to spin it as best they could. "It doesn't matter how strong they are, we'll win because we're smarter!"