Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My favorite book in the series

I loved this book & read it straight through. At a dog training symposium, the dog trainers are dropping like flies. Rachel & Dash work undercover in this whodunit. With lots of twists & turns, the story kept me guessing right up until the very end. Woven into the story is info about various training methods, plus entertaining grumblings from the various trainers. Having spent a good deal of time with people in the dog world, I enjoyed the personalities of the dog trainers and found that they shared many of the same aggravating traits of the dog-fanatics who I have met through the years.