A Bad review for Manual for a Murder

So, I find a bad review on the book, here's the link and the review:

https://www.goodreads.com/book/show/36272180-manual-de-um-homic-dio

Darlene:

"Marina has an affair with a married coworker. After their affair ends, her former lover's wife is killed. Oscar is a police detective investigating the death. When Oscar finds out about the affair, Marina is added to the suspect list.

This story is divided into three parts. The first and last are from Marina's point of view and the second is from Oscar's point of view. The two different viewpoints add a little more intensity to the story than if only one was presented. 

I read a translated version of this book. There were some parts that read a little awkward, and that slowed the flow of the story for me. This is a short book though, so it was still a fast read. 

Dark, clever, and tragic. A good read for mystery fans"