I was naturally curious about outliers so went to the most vivid book which is "Pygmy". I haven't read this book, but style of it is listed as incorrect grammar

I was naturally curious about outliers so went to the most vivid book which is "Pygmy". I haven't read this book, but style of it is listed as incorrect grammar "English" written in a detached scientific tone. I wonder how much this threw off the algorithm to cause it to have such a high score (over 100% and nearly 25% higher than second most vivid).