The cassette tapes,probably available ONLINE, by Keep the Faith, they may be available as CDs, of the Commentary on the old Penny Catechism (England) by the late Fr Hugh Thwaites S.J. might help some, they are beautifully spoken and explained. There was and is a small booklet by Fr C.C.Martindale S.J.: Steps to the Catholic Faith. The problem is that most of the good thibngs were written for a very different world and for very different types of non-Catholics. It would be interesting to find a book that not only explains the basics of the Faith but explaining the mess we are in now. Some people might like Monsignor A.N.Gilbey's We Believe (available in the U.S.A.). If they could find it a novel by Fr Bryan Hougton: The Marriage of Judith might get them going in a way that a religious/theological book might not. Most people don't read much now anyway.
Specific matter aside, the audio
format is an excellent suggestion, as opposed to books.
"Plug and play" as opposed to reading, and speaking of different worlds and times, has a greater likelihood of actually being used,
even if "down the road" by one not yet in existence.
Add to that, a person is more likely to be illiterate
than literally deaf,
esp. given the conditions of this Topic.