The statement in Article 28 of the Belgic Confession that all believers are "in duty bound to join and unite themselves with" an instituted church that has the three marks of the true church has proved to be controversial in North America and Europe. Engelsma's recent book, Bound to Join, addresses the doctrine of church membership and has received criticism from both expected and unexpected critics.

This book answers those critics, defending the doctrine of church membership and demonstrating that love for the universal, invisible church invariably expresses itself by love for the manifestation of this church in the church institute. This book also examines the "house church" movement and the claim by such men as Harold Camping that the church age has ended.

This book is a must-read, especially for those who have read Bound to Join