Looking for Answers about Christian Focus Publications Song of Songs?

This commentary takes a line, it was at one time the consistent evangelical live but that has changed with many in recent years taking the Song to be a book dealing with marriage and sexuality. This opinion appears to be gaining less favour of late so it is time for a modern commentary which takes this viewpoint into account, but which reestablishes the line that the Song of Songs is primarily an exposition of the spiritual relationship between Christ and the believer.