The Greenleaf Guide to Famous Men of Rome is an optional supplement for the book. It includes, for each lesson, a vocabulary list and several discussion questions designed to bring out the key points of each biography through a Christian (biblical) perspective. The discussion questions are excellent narration starters and really do help bring out the theme that "individual people and their actions have a significant effect on history".
Our first year of homeschooling we used a dry textbook for American history. Well, we didn't really use it - we put it off as much as possible and the year passed with only the first few chapters read.
Our second year of homeschooling, we discovered Greenleaf's Famous Men series (through enrolling in the Kolbe Academy Home Study program). What a difference! It was our first exposure to literature-based history study, and the idea of studying time periods through "real books" was a formative one in our homeschool.