The John Decker books are listed as a series of standalones, and that's true for the most part. Being the 2nd book in the series there isn't a whole lot of "backstory" to allude to in this installment, but there are some mentions of the previous incident, and characters from the 1st book.
That aside this is another fantastic John Decker novel. Short, and sweet; meaning it's a nice palette cleanser in-between your other reads.
This book essentially picks up right at the end of the previous. Decker has lost his job as the sheriff of Wolf Haven, and got a mysterious phone call about a "monster hunting" gig in Alaska. Some kind of critter is shredding up the locals, and no one can explain it. The monster in this book was one I've never heard of, and after looking up images I can say without question it is indeed a creepy mofo. You think you have an idea of what it is in the beginning, and then it really gets described, and you're like: "Oh damn. Creepy."
Again just like the 1st book, and I hope this continues, but there is SO much interaction between the characters! Dialogue, and dialogue, and dialogue. It might not sound like a big deal, but it's really refreshing to have characters talking to one another to reveal information instead of static info dumps.