I found the topic of the Russo-Finnish war so intriguing that I bought this book as well as the one by William Trotter (the only ones I could find). This book ("The Winter War") was a true pleasure to read, and exceeded my expectations. I was a little nervous when I bought it, given some of the poor reviews given by a few of the previous readers. My only guess is that they were thinking of a different book, or found the reality of the Soviet Union as an aggressor inconsistent with their worldviews. I should have been tipped off when the one reviewer questioned why the Finns didn't give Stalin what he was asking for! I read the entire book in a single day, and can tell you that it is an extremely exciting story. The book mixes actual accounts from those involved throughout the history, which makes it read like a novel. As far as the one reviewer's comments about the editor not having a good command of the English language, I honestly did not find any such problem. I was an English minor in college, and tend to be fairly sensitive to such problems. Rereading the review in question, I suspect that his real issue was with the portrayal of the Soviet Union as the aggressor.
As far as the other book ("A Frozen Hell"), I sent it back for a refund. That book actually portrays Stalin as the victim!