So possibly you are finding that your small group may be getting stale or stagnant and really needs to strip away some of the fluff and get back to real spiritual growth? The latest release from Mark Batterson entitled Primal, just may be a good place to start. The book has what I would consider a small group friendly layout and seems to lend itself well to devotional style reading.
I particularly liked the second chapter and the way it deals with our actions and reactions as Christians. For me, that really is the essence of what we are doing as we try to impact the world around us for Christ. We are either acting, which anyone can do, or reacting which is what will reveal our true heart.
So get on your quest and check out a copy of Primal, especially if you feel like you have lost a bit of soul in your Christianity.