The How to Guide Juniors Agent of Change Books Set like the companion How To Guide for adult volunteers offers key information about the journey, its awards and its leadership benefits, and step-by-step sample plans for how journey sessions can unfold as girls meet. The adult guides also feature sections on Girl Scout history as well as understanding girls at each grade level. Each "How To Guide" / Journey Book Set has everything adult volunteers need to enjoy this amazing journey. Just bring your enthusiasm and sense of adventure. How To Guide and Agent of Change Girl's Book.