Another of his most famous theological works is "The Eleventh Chapter" ("Al-Bab al-Hadi 'Ashar" - the title is an allusion to an earlier work of his, "Manhaj ul-Salat", which was composed of ten chapters), which he composed towards the end of his life as a concise summary of Shia doctrines for the learned lay person (rather than aspiring scholars). Judging by the number of commentaries written on it, and its translation into Persian and English, it represents his most popular work.