Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Drawn out and boring, hard to understand

I found Supervision of Police Personnel (6TH) to be pretty much drawn out and boring. It is painfully evident that the same information could have been relayed in a lot less then 400 boring pages. It was difficult to follow and often repetitive. A lot of detail was focused on irrelevant material. This was a difficult book for me to swallow (as a 12 year LEO), but it certainly rated high as a sleep aid for me.