Alpha and Omega

"This series is set in the same world as the Mercy Thompson Series, but on a slightly earlier time line. It begins with a novella titled Alpha and Omega published in the On the Prowl anthology. The decision to continue the story was made after the anthology had already been published, which has caused some confusion, since "book 1" is a actually a continuation of the short story. The series has plenty of action, but there's more emphasis on the romantic attraction between the hero and heroine. On a romance-readers scale, this series is sweet rather than steamy." From author's Web site.
"The series itself is set in the same world as the Mercy Thompson series and is loosely connected... The protagonists of the Alpha and Omega books are Samuel's brother Charles and his newly acquired mate Anna." From author's Web site.