National Park Ranger Anna Pigeon is back in Michigan's Isle Royale National Park, as part of a team studying wolves and moose (but especially wolves). The team consists of scientists from around the country as well as a thoroughly unlikeable Homeland Security Agent. Wolves, especially, appear to be acting strangely, and old legends about mythical creatures nudge into Anna's consciousness as she desperately seeks the answers to grisly deaths while facing death herself.
The wildlife and nature's beauty are characters in the mystery. And creation of complex, deep characters is one of Barr's talents. The plot is smart and complex enough to be interesting but not so much so that it completely takes over the setting and characters, and their integral part in the events and outcome. A few of the graphic descriptions are not for the faint of heart but there are not a great number of them.
If you like nature, or delving into the motivations of human beings and the intricacies of human nature, you'll like all the Anna Pigeon mysteries.