Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 4th Sheriff Brady mystery still good

I enjoyed the personal development of Joanna's story in this 4th installment. My only complaints would be I wanted to get to know Hal Morgan better, and the motivations for the murder at the end were a bit sketchy. I won't do a spoiler, but I wasn't able to figure out why they did what they did and to whom.