I recommend Unabridged Christianity by Fr. Mario Romero to anyone interested in learning more about the Catholic faith, especially answers to questions raised by fundamentalists and evangelicals.
Fr. Romero has done an excellent job not only of providing biblical answers to objections, but also of explaining Catholic doctrine using the Catechism, Scripture, and quotes from the early Fathers, Doctors, Councils, and papal documents. The book is extremely readable and very well organized.
Each section presents a Church doctrine along with Catholic teaching on the subject, and then presents and refutes major objections to that doctrine.
The book is only $12.95, and should be available at any Catholic bookstore. It is rated 5-stars at Amazon.com.
I believe everyone interested in the Catholic faith should read Unabridged Christianity including everyone from cradle Catholics to those simply interested in learning more about Catholicism.
____________________ Understanding is the reward of faith. Therefore seek not to understand that you may believe, but believe that you may understand. - Augustine