Gus, Jepperd and co. are on the path to Alaska to trace the source of the outbreak and hopefully find a cure. In this book they meet the benign Wally, a gentle man on crutches who lost his family and who now lives in an abandoned dam containing within it enough food and supplies to last years. But Wally seems to be hiding a secret and Gus might end up paying the ultimate price...
Jeff Lemire brings the series back up to its original high quality after a rocky third book with this excellent fourth volume "Endangered Species". The pacing is a lot quicker as the group heads out into the snowy wilderness leaving the urban grime and distracting street gangs behind, and we get the chance to get to know some of the fringe members of the group.
There's a strong anti-science, pseudo-pro-religion argument being made by Lemire in these books that I don't find off-putting but become more curious to see where he's going with it as the series progresses. These religious overtones manifest in this book in a great limbo sequence painted in watercolour and containing lots of dream fantasy images.
The writing is top notch, the art is as good as you would expect (and some guest artists chip in a few pages - Nate Powell, Matt Kindt, and Emi Lenox), and the story is developing strongly in pleasingly mysterious ways. "Endangered Species" is an excellent addition to this series and makes me want to read more "Sweet Tooth". Roll on, November...