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I agree Radio Replies is a great idea, and I think I recall seeing them advertised as available on audio, either tapes or CDs.
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But like stated above, the sound copy might be more useful instead of a book. Although for some a book is preferred. Maybe both!
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Keep the Faith has a lot of cassette tapes that would be wonderful.
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They have recordings of Bishop Sheen who was pretty persuasive with Protestants, at least at a basic level.
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Sometimes getting them to take the first step -- recognizing the authority of the Catholic Church -- is the hardest.
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Protestants already have an abiding respect for the Church, but they've misplaced the value of authority.
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I knew a fallen-away Catholic who became aggressively Protestant, and his major hang-up was AUTHORITY. He never failed to challenge me whenever I mentioned the infallibility of the Pope or dogmatic definitions or the Church Magisterium (teaching office).
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To him, HE was the one who was infallible, and so is every Protestant! So I asked him how can two Protestants who disagree on some point both be infallible. He would dance all around that question and never had a solid answer. He seemed to think it was funny.
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Some of the best Keep the Faith tapes I have heard are old recordings of Catholic priests who were missionaries in China.
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One that comes to mind is Fr. Aidan McGrath, an Irish priest from Dublin who had never heard of the Legion of Mary until he went to China. He said they tried to give him credit for starting presidia in China and he denied it, saying with a lovely Irish brogue, "The Legion spreads itself! I had nothing to do with it. You couldn't stop it!" -- That was a recording made in Australia in 1957 after he had been expelled from China after surviving about 7 years in prison surrounded by other priests who went mad or died of strange ailments in prison. It was prayer alone that got him through and he has no idea how that was but it was. Standing for 3 days in chains unable to sneeze or cough or close his eyes, longing to faint but couldn't, being asked stupid questions, told he must confess to a crime he no more committed than you or I did.
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It seems to me that a Protestant could hardly ignore the power of Mary's grace evidenced by the descriptions of these good priests.
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Communism has provided for us a tremendous historical evidence of the power of grace -- see what's happening in Russia today.
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Father Smith Instructs Jackson by Archbishop John Francis Noll (1875-1956). 

He is said to have had a significant impact on Catholic publishing during his 58 years of priestly ministry. His skill in defending and explaining the Faith was honed during the early 1900s, when he began his mission work to non-Catholics, often attending Klu Klux Klan and other anti-Catholic rallies in order to directly confront the speakers and attendees. He launched what has become one of the largest Catholic publishing houses in the world, Our Sunday Visitor. In addition to creating a national Catholic newspaper and distributing millions of topical pamphlets on the Faith, he published several books, among which Father Smith Instructs Jackson quickly became a best-seller. He earned the honorary title of Archbishop as a sign of the Vatican's esteem for his work.

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His name is where the Victory Noll Sisters came from. Their Motherhouse remains to this day at Huntington, Indiana, a great cultural landmark and center of international scope, since the Sisters have missions worldwide.
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http://www.huntingtoncounty.com/our_sunday_visitor.htm

The paper did take time out to mark its silver anniversary in the May 2, 1937, issue. Bishop Noll noted in an editorial that every cent the paper had ever made was invested in the Church, including a new order of nuns in Indiana he had supported with Our Sunday Visitor income.
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The main object of Our Sunday Visitor’s charity, he wrote, is the maintenance of the motherhouse and training school of the Society of Missionary Catechists (popularly known as the Victory Noll Sisters), which now has 200 members working in the most difficult home-mission fields. The editorial noted that Our Sunday Visitor used all its earnings for the support of religious, educational and charitable works, and pointed out that the firm was the nation’s largest producer of religious pamphlets and the first to promote the use of and to manufacture and print the Every Sunday Collection Envelope for Catholic churches.
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hroughout the war years, Bishop Noll’s newspaper focused on fighting the war of moral armament on the home front. Evils such as birth control, divorce, indecent literature and movies were the target of editorials and features.

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But the war in Europe was ever present, too. Many issues featured letters from soldiers. One, signed “A Grateful Soldier,” praised the work of Catholic nurses in preserving the faith in battlefront hospitals. Priests wrote columns of Tips for Soldiers. Many issues contained letters from chaplains at the front, filled with details of Catholic heroism. Editorials urged readers to “send your copy to a boy in the service.”
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At home, Catholics read about how Americans were backing the war effort. An Illinois bishop donated the bumpers from his car to the nation’s scrap drive, painting their wooden replacements with aluminum. Bishop Noll praised such efforts. But the paper found fault with the general drift of the times: “Society adrift from God: If the world doesn’t return to Him in spirit of repentance, it is doomed,” read a banner headline in early 1942.
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Reflecting its interest in family life and problems, a 1953 headline asked, “In your movie going, do you encourage stars who do not live morally?”

Um, because I said uneducated. You really want to put the Holy Bible in the hands of an uneducated Protestant? What do you think that will achieve? They already have their adulterated versions anyway.
Serious replies only, folks.

Yes, with a Catholic Bible, because as a starting point it can shown that all of the truths of the Catholic Faith can be found in the Bible.   

Yes, with a Catholic Bible, because as a starting point it can shown that all of the truths of the Catholic Faith can be found in the Bible.  

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You're going to lose that argument, because the Church does not require that "all the truths of the Catholic Faith can be found in the Bible." If you start there, the Protestant will say you show yourself to be a deceptive liar. 
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While it is not required that does not mean that they cannot be found.  

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Can you find the infallibility of the Pope in the Bible?
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Where is the doctrine of the bodily Assumption of Our Blessed Mother in Scripture?
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Where in the Bible does it say that Our Lady is "the Mother of God?" 
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If you're going to argue that the Bible doesn't have to literally say something, then where does the Bible say that? Because for a Protestant you'll have to provide a Scripture chapter and verse for every principle you claim.
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Can you find the infallibility of the Pope in the Bible?
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Where is the doctrine of the bodily Assumption of Our Blessed Mother in Scripture?
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Where in the Bible does it say that Our Lady is "the Mother of God?"
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If you're going to argue that the Bible doesn't have to literally say something, then where does the Bible say that? Because for a Protestant you'll have to provide a Scripture chapter and verse for every principle you claim.
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Matthew 16:18
¹⁸ So I now say to you: You are Peter and on this rock I will build my Church. And the gates of the Hell shall never overpower it.

I can only do one at a time.
Apocalypse 12:1

¹ Now a great sign appeared in heaven: a woman, robed with the sun, standing on the moon, and on her head a crown of twelve stars.

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So, what's the point?  Do you know how many interpretations there have been of that verse? One is Our Lady of Fatima. So, what does that have to do with my questions?
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So, what's the point?  Do you know how many interpretations there have been of that verse? One is Our Lady of Fatima. So, what does that have to do with my questions?
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If John saw her then how did she get up there if she were not assumed body and soul?