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.
Mafatih al-Jinan contains some of the richest and most reliable duas (supplications) and verses from the vast Twelver literature and its collection (authenticity of scripts) is reliable & its compilation has been highly approved by Shi'a clerics throughout the last century.
The book is widely popular in the Twelver world and almost every Shia household in Iran possesses a copy of it.
It is widely available at Shi'a shrines in much of Iran & Iraq as it contains acts of prayers and texts of supplications and invocations which hold a prominent place in the Twelver Shi'a form of worship.
The book was originally in Persian translation & commentary accompanied with Arabic text, but later on was translated into many major languages, such as Urdu, English and Hindi.
- full text at http://shiamasjid.com/books/Almanac/index.htm