Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I could not of asked for a better end to the series. I am not going to explain and spoil the book so just buy it. I really hope another book comes even another lost files book to follow up and explains the ending because i feally hope it's something. If you have read the book you knos what i mean