Instruct: Classify the given review as either positive or negative.
Query: Exciting fourth installment in the Joe Pickett series!

CJ Box's fourth book in the "Joe Pickett" series is an exciting and suspenseful work, perhaps the best of the series so far. Throughout the book, the suspense builds slowly but steadily around two mysterious murders and several strange cattle mutilations(so much so that I, as a reader, was feeling on edge and felt like I was there in the small town of Saddlestring, Wyoming, experiencing what was happening and wondering what would occur next) and then comes together in a complex yet fascinating way. This book is excellently crafted and offers a great continuation in the Joe Pickett series to those who have read Box's other books. If you are new to this series, I have no doubt that this book will get you hooked. I am hopeful that there are many more installments to come in this great series.