Sorry, but this post will probably not sit well with some people!
Recently added to our collection is a book called Flattened Fauna: A Field Guide to Common Animals of Roads, Streets, and Highways [591 KNU]. I'll bet, after your initial "Eeeuuu," your curiosity was piqued? Does it come with pictures? Black and white illustrations, yes, photos, no.
Does it include animals common to our area? It sure does, from chipmunks to squirrels to opossums to skunks (although why anyone would ever need to identify a skunk by anything other than its smell is beyond me!).
If the subject of roadkill interests you, then also look into Dr. Splatt. Dr. Splatt, at least according to an 2001 article found here, is a resident of our fair state of New Hampshire. To learn more about Dr. Splatt's RoadKill Project, click here. For an interview with the good doctor, click here.