Falsafa-e-Dua (philosophy of supplications), by Allama Fazl Ahmad Arif. A great book that covers almost every aspect of Dua, including its philosophy, benefits, and lists many prayers of famous people.
Biography of Hazrat Salman Farsi, a companion of the Holy Prophet (peace be upon him), by Allama Fazl Ahmad Arif.
Maktabah Mujaddidiyah