Baltimore Catechism

Baltimore Catechism:

This one is a highly recommeded catechism because everything is in a question and answer format, it is easy to understand and clear with teachings. Everyone should get familiar with the contents of this Catechism. Here is a link to purchase one.

Another good resource is Bishop Athanasius Schneider's Credo, it covers many contemporary issues in a question and answer format in a very clear and unambiguous way.