Bone Crossed is the 4th Mercy Thompson novel. Mercy is not a werecoyote. She's a shapeshifter who changes into a coyote. There's a difference. She's dating a werewolf, she bought her garage (she's a mechanic) from a fairy, one of her best friends is a vampire, and she can communicate with ghosts. What's not to like?
This time around she's still recovering from her experiences in a Iron Kissed and trying to settle down, but Marsilia (the head of the local vampires) has discovered what she did in the book Blood Bound and she's fighting for her life. To make it more interesting, an out of town vampire decides Mercy would be perfect for his herd.
If you haven't figured it out from the above, you really need to read these books in order. Start with the first in the series, Moon Called, and read them all. They're hard to put down. I started this one last night, after completing another book, and finished it today. Very Highly Recommended.