The Philosophy Files 2 follows a strict format- explaining complex philosophical ideas through the medium of arguments between different characters, each trying to put forward one side of an arguments. Generally, there's a reliance upon metaphors in order to illustrate points supplemented by commentary from the author.
The book is utterly readable and not too complex. It literally picks up where The Philosophy Files leaves off and loses none of it's charm or brilliance. In fact, I found that the sequel sometimes surpasses the original (in the sense that the titles of chapters are actually relevant).
So why does it get four stars? Quite frankly because it occasionally lacks attention to detail in it's explanations. In particular i'm thinking about the chapter on killing people, in which the authors illustrate the case of whether killing an innocent to save more lives is acceptable. The authors provide three analogies; the first two conclude killing an innocent is correct and the last concludes otherwise without any explanation as to what distinguishes it.
However, this book would be great for children/ teens developing an interest in philosophy or for teachers wanting to broach such issues in the classroom.