The book is a decent primer on how to plan a calendar but besides giving the basis for planning, it doesn't give much more guidance than that. He suggests looking at many circles of information (term borrowed from Google+) to make a plan, including the Bible, community, your church calendar and liturgical calendar.
What Rummage is missing is the church responding to movements of culture, but the concept is sound. A good primer for introducing a communicator to week to week to week speaking.