Know the Creeds and Councils (KNOW Series Book 1)

A Systematic Study of the Catholic Religion

Westminster Confession of Faith

Truth and Grace Memory Book One: Ages Two to Nine

Didache

The Catholic Confession Book: A Pocket Guide to the Seven Penitential Psalms, Sacrament of Reconciliation and Examination of Conscience (Going to confession the right way)

St. Irenaeus of Lyons: On the Apostolic Preaching | Early Christian Theology Book for Biblical Studies | Second Century Church Father Writings | ... Faith and Scripture (Popular Patristics)

Sources and Contexts of the Book Concord

New England Primer

Saint Cyril Collection [5 Books]