This volume opens when the caliph al-Mansur has just defeated the rebellion of Muhammad the Pure Soul in 145/762-3 and is now securely established in power. The main concerns of the remaining thirteen years of his reign are the building of his new capital at Baghdad, on which al-Tabari's text contains details not previously published in English, and his efforts to have his nephew 'Isa b. Musa replaced as heir apparent by his own son Muhammad al-Mahdi,...