Patricia Briggs also does another series called the Alpha and Omega. The only downer is the real beginning of the story is in On The Prowl. Which is a combined book with four short stories which I don't believe you can find in bookstores. You may have to order it online. Cry Wolf and Hunting Grounds you should be able to get anywhere.

I'm mainly into vampire books but after reading Patricia Briggs I've really gotten into werewolves. I have the same problem of finding books. Recently I found two books at the used book store that are about werewolves. I have yet to read them so I can't promise they will be any good. They are by Susan Krinard. One is titled Secret of the Wolf and the other is To Catch a Wolf. They may be romance though.