This audio book is composed of recordings of the actual speaker for each presentation. It is great to hear the speaker's voice and the Q&A session that followed. The introductions for each speaker by Eric Metaxas (also the editor of the book) are a bit longer than is needed, but were tolerable. On one or two occasions the microphone provided for the audience questions was not used, or did not pick up the speaker very well, and it was not possible to hear the question. Overall, these are great presentations by very qualified speakers. The range of topics is excellent.