Why Preach/Teach on a Catechism?
According to this Reformed Worship intergenerational survey, it’s the oldest church members who say they find catechism preaching helpful for living the Christian life.
So you may be surprised to hear that younger Christians—even people not yet believers—also find themselves intrigued by sermons based on catechisms. At least that’s the experience that several church planters shared at a recent Calvin Symposium on Worship panel.

The 52 Lord's Days that Rev F Guillaume (1905-1972) preached on from 1967 to 1972 are now available.
Rev Guillaume was born in Amsterdam in a Reformed family. He began his ministry as a young man in Oosterend, Friesland Netherlands. He also served in Klundert, NB, Sneek, Friesland and Amsterdam West, NH before emigrating to Canada in 1953. He served Toronto Rehoboth CRC and Edmonton III Alberta before retiring to Brantford, Ont. In 1970.
Rev Guillaume preached more than 5,483 times and made more than 1,871 different sermons from Aug 1928 to Oct 1972. He spent 3 ½ in Dachau and was freed by the American Army in Apr 1945. When he immigrated to Canada he began preaching in the English language. He made a habit of writing out his English sermons. It is from these written pages that the sermons on the Heidelberg Catechism are published.
These sermons can be regarded as a personal reflection based on his many experiences during his life (losing his mother at 13, losing his first wife at 31, losing his unborn son and his freedom at 37 and pastoring many during the depression, after the war and during immigration.)
see:
http://www.authonomy.com/ and search for Catechism or Sermons or Guillaume
Is such a book worth publishing?