Lodges: The Faithful is a nice little book, though I wouldn't say it's a necessity for anyone running or playing a WTF game. It's basically a laundry list of a wide variety of "Lodges", sub groups within Werewolf society that are between a tribe and pack in terms of size and import. Some are secretive. Some are open. All of them have include the various ups and downs of secret society membership.
As I said, it's a nice book, for what it is. Most of the lodges described are reasonably interesting, and every one of them includes a few suggested story hooks for people to work them into their campaign. I can't imagine a campaign large enough or long running enough to use all of them, however, which means that most storytellers and players are really only likely to use a few pages out of the entire book. Still, some of the Lodges could inspire some neat concepts, and almost all of them are fun just to read about.