Title: Blood Trail
Author: Tanya Huff
Published: 1992
Publisher: Daw Books
The second book in the Victory Nelson series really gets the ball rolling by introducing a family of werewolves just outside of London, Ontario, who live a quiet life running a sheep farm.
And the person assassinating them.
The were-folk ask Henry Fitzroy to help them solve the murders, and he asks Vicky Nelson, gumshoe at large, to come out and help him work on the case during the day.
The case preceeds apace until Mike Celluci shows up and cranks the sexual tension, as well as getting off on entirely the wrong foot with the alpha-male were-wolf of the farm. Between them all, however, they create a very energetic, enjoyable atmosphere.
The best part of this book is, quite honestly, the were-wolves, who are different from just about any series I've seen, with no real desires for carnage with humans, and very real animal issues.
The book is a fast read, perhaps 3 or 4 hours at the most (if you have that much time to read at a stretch) but is very involving.