To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
I like the idea of this book, but it needs some fixing. I read it to reinforce the grammar and vocabulary I learned in the Duolingo Turkish course and to increase my basic vocabulary. For that to work, the English and Turkish sentences need to correspond. That was true for the most part, but there was a sentence in Turkish entirely missing from the English - about washing hands before eating - and in at least one other place the sentences were in a different order. If those and similar bugs were fixed I would give 5 stars.