Living In The Joy Of Faith: The Christian Faith As Outlined In The Heidelberg Catechism by Clarence Stam.

The author, a pastor in the Canadian Reformed Church, provides the reader with a series of sermons on the doctrines presented in the Heidelberg Catechism. Each chapter contains relevant catechism questions and answers, an outline of the sermon and the sermon itself along with appropriate Scripture on the topic.

God In Three Persons by E. Calvin Beisner.

Lost by many in our generation is the great struggle that occurred in the early church in the formulation of basic Christian doctrine.