The holy book ―Sirr us-Salat is a work of the perfect mystic, the spiritual cod’s which was written by Imam Khomeini (a) in the year 1358 (lunar year) [19 Khordad 1318 (solar year)]. The book ―Sirr us-Salat has been reprinted a few times so far, but as publishers, due to the inaccessibility to the manual main copy, were not able to publish an accepted copy, The Institute for Complication and Publication of Imam Khomeini’s (a) Works—International affairs department—has published a respectful accepted and perfect copy enjoying, the information lists of different names, locations and necessary items, added with footnotes. The book begins with a letter addressed to Haj Sayyid Ahmad Khomeini, offering the book to him. More, important, the book has been decorated by the Imam’s manual, The Original text.