Mafatih al-Jinan (Keys to Heavens) by Shaikh Abbass Qumi is a Twelver Shi'a compilation of selected chapters (surahs) from Quran, Taaqeebat e namaz (acts of worship after namaz), supplications narrated from the Ahle bayt and text of Ziyarats.
He was also a devouted Muslim, who regularly observed Namaz and never missed Roza.