I've read this novel 3 or 4 times over the years and it never disappoints. Recently I was trying to find another series about werewolves like this to read but came up empty. All the other series I found were poorly disguised trashy romance novels, sometimes bordering pornographic and with no respect for their female characters. I know some people like that and I'm not judging people for liking them, but it was really surprising and upsetting that I couldnt find any series that were in this same vein as this one. Her Mercy Thompson series is also great but I have already read through them all and was looking for another series.
If you are looking for a sweeter romance that is steeped in werewolf lore and well written this is a great series for you. There is a prequel novella called "Alpha and Omega: A Companion Novella" that was helpful to read first and I would recommend doing so (I initially read this book first without knowing) but she does do some recaps so its not 100% necessary. I did really enjoy seeing this early stage of Anna and Charles romance in the novella though.