For example, the tract Who Really Controls the World? leads into lesson 5 of that brochure. The tract What Is the Key to Happy Family Life? leads into lesson 9.
كَمَا أَنَّ ٱلنَّشَرَاتِ تُسَلِّطُ ٱلضَّوْءَ عَلَى كُرَّاسَةِ بِشَارَةٌ مِنَ ٱللهِ وَتُشِيرُ إِلَى دَرْسٍ مُحَدَّدٍ فِيهَا .‏