Al-ḥamdu lillāh, the compiler of these books is a humble servant of Allāh subḥānahu wa ta‘ālá from Chennai, India. What started as a learning process for herself, soon took the form of books, by the mercy and grace of Allāh subḥānahu wa ta‘ālá, with the hope that they would benefit those who read them. May Allāh subḥānahu wa ta‘ālá accept it from all of us.