The deviation from, or breach of the fundamental duties, obligatory or compulsory, to transgress the limits imposed by Allah and to break the Shariah laws is called a 'major sin' (al-kaba'ir, sins).

This book is mostly based on the Arabic book 'Kitaab al-Kab'air' written by Shaikhul Islam Muhammad bin 'Abdul Wahab, an eminent Muslim scholar. The book describes various kinds of major sins about which there are reproaches in the Holy Qur'an and in the Traditions (Ahadeeth).