This wonderful book is a guide to the Naqshbandi Mujaddidi Sufi path and contains guidelines for the various stages of this noble path. The author, a khalifa of Khwaja Muhammad Masoom Sirhindi (d. 1079 AH), has collected excerpts from the books of Naqshbandi masters about specific stages and lessons of this path, with few additions from himself. The books from where the excerpts are taken include Maktubat of Imam Rabbani Shaykh Ahmed Sirhindi (d. 1034 AH) and Maktubat of his son Khwaja Muhammad Masoom Sirhindi.
وسیلة القبول، مکتوبات خواجه محمد نقشبند سرهندی، فارسی
Maktoobat (letters) of Hazrat Khwaja Muhammad Naqshband Sirhindi (d. 1115 AH), who was the son of Khwaja Muhammad Masoom Sirhindi Mujaddidi (d. 1079 AH).
This is one of the earliest and most authentic books on the biographies of the Sirhindi family of Sufi masters in India. It is written in four volumes, each dedicated to a different Shaykh of the Naqshbandi tariqa.