The second book of the Let's learn about... series deals with the subjects related to our Prophet (S), and it consists of ten main lessons that start with The need of divine leaders and ends with the lesson regarding the fact that our Prophet (S) is the Seal of Prophecy. The lessons can be studied in one go or divided in several sub-lessons depending on the children's ages and abilities.

Volume four of the Let's learn about... series deals with the subject of imamate. The book comprises ten main lessons. Some of the issues discussed are: Where did Imamology begin?, The conditions and special qualities of the imams, Who selects the imam?, the Qur'an and imamate, the twelve imams and The twelfth Imam.
The lessons are very imaginative with lots of opportunities to ask questions and think of answers.

Book five of the Let's learn about... series deals with the issues regarding one of the five pillars of religion which is the Divine Justice. The ten lessons presented in this book deal with issues such as: what is justice?; the proof or reason for the Creator's Justice; the philosophy of Signs and Evil, of undesirable events in life, of signs and catastrophes; The issues of predestination and free-will; the middle way; guidance and error are in God's hand and God's Justice and the issue of eternity.