The book is titled The Greatest Commandment, since it is the most important point of the book. (John 5:41-42) If you Love the Lord your God with all your Heart, Mind, Soul, then why is there a second law? The second law really displays the same principles as the first. This is why the first commandment is the greatest or most clear description of what God calls us to do. God is a Creator, and the law is a representation of how he builds. How do you Love the Lord your God with all your Soul, Heart, and Mind? Master the second law and the first law will become clearer.
The photo on the cover is symbolic to the laws by which we are governed, just like scriptures state that the law is the cornerstone of government. Consequently, you are no longer foreigners and aliens, but fellow citizens with Gods people and members of Gods household, built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone. (Ephesians 2:19-20) For to us a child is born, to us a son is given, and the government will be on his shoulders. (Isaiah 9:6)