why are book reviews important ? They give readers insight into the quality of a book before they even buy it. Reviews can help potential readers decide if the book will meet their reading expectations, if it will be worth their time, and if it might be unsuitable in some way. They also let authors know if they’re hitting the mark, or what they could work on to make future books more successful. Without book reviews, authors may never receive feedback on their works, and readers would have to purchase every book in order to find out if it is worthwhile reading or not.