I recently reread Embryo: A Defense of Human Life (Doubleday, 2008), authored by my friends Robert P. George and Christopher Tollefsen. It's a sophisticated though readable defense of the prolife position by two accomplished philosophers. This is an ideal supplementary text for upper division courses in bioethics. For those interested in better understanding the "New Natural Law Theory" and its application to practical issues, this is as clear a presentation you will find.
The other book is authored by another friend, Scott Hahn. Entitled Reasons to Believe: How To Understand, Explain and Defend the Catholic Faith (Doubleday, 2007), Scott graciously sent me and my wife, Frankie, a copy of this book soon after we were received into the Catholic Church in 2007. (In fact, Scott sent us several books, some of which I still have to read!). Reasons to Believe is a clear and concise presentation of the Catholic faith. I really liked it. Scott covers a lot of material with which high-powered Catholic apologists are already conversant. However, this book is not meant for them. It is intended for church catechesis, whether remedial or introductory, as well as the sharing of one's faith with family and friends.