In Tayyibi Isma'ilism, Rasāʾil Ramaḍāniyya refers to the works composed by the Da'i al-Mutlaq for the most part during the month of Ramadan.
Each Risalah (epistle) is given a title gematrically equivalent to the Hijri year of its publication:[1][2] "The context of the quoted texts is not left to the reader to determine, as in the two above-mentioned anthologies.
In addition, each Risāla begins with the traditional introductory taḥmīd, original poems in praise of the Prophet and the imams, and extensive supplications showing a rhetorical mastery of the Arabic language.
The wealth and variety of quoted texts make the Rasāʾil al-Ramaḍāniyya a treasure trove of writings, which are otherwise inaccessible to non-initiates and low-ranking daʿwa officials.
"[2] A set of the Rasāʾil were presented to the Bodleian Library in the University of Oxford on behalf of Syedna Taher Saifuddin 12 July 1949.