I have a list of books I pass on to those who are studying to be Catholics. These books may or may not be part of their group or individual studies.
Here is the list.
The Compendium to the Catechism of the Catholic Church.
The Douay-Rheims Bible
The Roman Catechism, also called The Catechism of the Council of Trent
The CTS Sunday Missal hardbound
The Lives of the Saints dual book, Vol. I and II
or
Lives of the Saints for Everyday of the Year by Butler
Are there any convert readers who would like to add books significant to them? I assume all get or buy a CCC immediately.