![Gideon la Novena (Saga de la Tumba Sellada 1) [Gideon the Ninth]: Tetralogía de la Tumba Sellada, Libro 1 [Tetralogy of the Sealed Tomb, Book 1]](https://m.media-amazon.com/images/I/51-bULkvYZL._AC_US60_SCLZZZZZZZ__.jpg)
How are ratings calculated?
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.
