Confessions
The Catechism in a small booklet, Soft Cover Gift Pocket-Size Edition, in shortened Questions & Answers
Zacharias Ursinus, Commentary on the Heidelberg Catechism, online | print | kindle
What was the history surrounding the writing of the Catechism?
An Introduction to the Heidelberg Catechism, Lyle Bierma
The Heidelberg Catechism: A Study Guide, by G. I. Williamson
The Theology of the Heidelberg Catechism: A Reformation Synthesis, by Lyle Bierma
Comforting Hearts Teaching Minds: Family Devotions Based on the Heidelberg Catechism, by Starr Meade
A Faith Worth Teaching: The Heidelberg Catechism’s Enduring Heritage, by Jon D. Payne & Sebastian Heck
The Church’s Book of Comfort, by Willem Van’t Spijker
The Lord’s Supper and the ‘Popish Mass’: A Study of Heidelberg Catechism Q&A 80, Cornelius Venema
Living and Dying in Joy: A Devotional Guide to the Heidelberg Catechism, Cornelius Vonk
For Children:
The Quest for Comfort, William Boekestein
For Young People:
The Heidelberg Catechism, G.I. Williamson
Sermons on the Catechism:
G. Van Reenen
Gerrit Kersten
Herman Hoeksema
George Bethune
Theodorus VanderGroe