Abstract: Ja’fan ibn Muhammad al-Sadiq was renowned by both Sunni and Shi’a Muslims for his virtues, education, and accomplishments. He was above all known for teaching Shi’a Islamic fiqh, called Ja’fari jurisprudence, and his all-encompassing information which had a great academic influence. Part I included a brief biography of his life, his conduct, and his deep knowledge in jurisprudence; it also delved into the state of the Shi’as during his time as well as his political confrontations with the Ghulat who held ideas that resulted from overstating particular Islamic beliefs. This part continues with material on Shi’a jurisprudence according to Sunni narrations, the Imam’s hadith collections, his debates, and his political confrontations given the pressures facing the Shi’a during that time.