Nothing is more important than the gospel message. 

The books offered on this website were written on a variety of topics.  Some of the books were written simply out of an interest in the topic itself. But over time it has become clear to me that no topic in the Christian world can be analyzed or discussed without keeping an eye on the gospel message. This is the heart of Scripture and God’s gift to the world. 

I pray the material on this web site will help fellow sinners receive the benefit of Christ’s work by believing it is true for them.

Most of these books and Bible studies have been published by Northwestern Publishing House (NPH), Milwaukee, Wisconsin. In recent years I’ve self-published several other books and Bible studies, all of which NPH is offering in its online store.

This site contains links to the NPH online store, where you can purchase this material. 

The site also contains free resources. The “Stained Glass” page offers examples of stained glass windows in Wisconsin Synod churches. The “Free Stuff” page contains free resource you might find useful. 

Robert Koester