Bound by Moonlight by Nancy Gideon
Not sure why it took me so long to pick up this one, but definitely will not wait so long to pick up Hunter of Shadows. I adore Charlotte and Max. Both are perfectly flawed, but highly likeable and you really cheer for them both individually and as a couple.
I still have several questions about the Shifters, Trackers, Chosen Ones. Luckily I still have 4 books to read in this series!