A few off my bookshelf that have not been mentioned.
Four decades ago I found Study Helps on the Heidelberg Catechism by Norman L Jones very helpful. Norman L. Jones was a leading pastor in the Eureka Classis of the Reformed Church. I believe it has been in print in recent years,
I also found An Aid to the Heidelberg Catechism by Rev. Otto Thelemann, translated into English from the Deutsch by Rev. M. Peters helpful. It may be long out of print, but was reprinted in my lifetime.
The 400th Anniversary Edition 1563-1963 The Heidelberg Catechism with Commentary was published United Church Press. This work is a translation by Allen O Miller in collaboration with Mrs. Marie B. Koons of Le Catéchisme de Heidelberg. Un commentaire pour notre temps by Andé Péry. My father said that it reflected the understanding of the Heidelberg held by Oscar Cullmann more than it did that of Barth.
The Christian Entirely the Property of Christ, in Life and Death; Exhibited in Fifty-three Sermons on the Heidelberg Catechism by Johannes VanderKemp translated from Dutch by John M. Harlingen Reformation Heritage Books 1997
Henry J. Kuiper, then editor of The Banner, edited a series of Sermons on the Heidelberg that were published by Zondervan in 1956. The quality of these sermons ranges from very good, to thoughtful, to schmultzy. Titles in this series are
Vol 1 Sermons on Sin and Grace. Lord's Day 1-7 1936
Vo 2 Sermons on the Apostles' Creed. Lord's Day 8-24 1937
Vol 3 Sermons on the Baptism and The Lord's Supper. Lord's Day 25-31 1938
Vol 4 Sermons on the Commandments. Lord's Day 32-44 1951
Vol 5 Sermons on the Lord's Prayer. Lord's Day 45-52 1956
Sermons on the Heidelberg Catechism from the Board of Publications of the Christian Reformed Church in 1970 is a collection of variable quality reading sermons replete with suggested hymns from the Psalter Hymnal.
Question: Has Kohlbrügge's Kleiner Katechismus, oder kurzgefasste Form der Lehre nach dem Heidelberger Katechismus been translated into English? If so, when was it last in print?