This critical Arabic text edition of K. al-Bayāḍ wa-l-sawād min khaṣāʾiṣ ḥikam al-ʿibād fī naʿt al-murīd wa-l-murād ("The Black and White in the Words of Wisdom by Bondsmen Describing the Seeker and the Mystic Quest"), a substantial handbook of early Sufism by Abū l-Ḥasan ʿAlī b. al-Ḥasan al-Sīrjānī (d. ca. 470/1077), is based on three manuscripts and is introduced by a detailed analytical study of the author and his work. The work is written in the tone of a guiding Sufi...