This is far and away the best collection of quotations are extracts from early works for the Catholic trying to show that what the RCC believes about the Mass truly goes back to the earliest days of the Church. If it doesn't convince Protestant Evangelicals that the earliest Christian were Catholics, it should at least convince them that they WEREN'T Protestant Evangelicals.
The quasi-fiction narrative at the end is extremely interesting, and serves to make the picture of the early Church somewhat more vivid, but the reader should bear in mind that it does contain some speculative elements and probably isn't that useful as an apologetic tool.
Otherwise, this is one of two books I would not hesitate to give to someone to whom I was trying to prove the earliness of the Catholic Mass.
Excellent book explaining how the mass was celebrated by the early Christians and how this is relevant to the way in which the mass is celebrated today. It gives good biblical references and is easy to read, not heavy or boring. I'm glad I bought this book.