Luckily, I purchased the Participant's Guide with the DVD, as well as the workbook. The DVD comes with a Leader's guide inside the case, and provides great guidelines for time with each session. It is very important to review the materials prior to presenting to the groups. It would be helpful to have the actual book for participants, too, as it is listed in the Participant's Guide for weekly reading assignments. I also purchased the workbook, which would really only be needed with the book, and not with the small group DVD or Participant's Guide.
The skits look dated and the DVD could use a new edition. That aside, it is excellent information delivered by the authors. I am using the group guide, which I find to be a bit too repetitive and have set aside. I do read the book with the guide and DVD, to help explain the concepts when we do discussion in our small group.